EU Regulation 396/2005: Pesticide Residue Testing and the Critical Role of QuEChERS Evaporation in Food Safety

<div><div><p><strong>Researchers led by </strong><a target="_blank" rel="noopener noreferrer" href="https://kudova.group.uochb.cz/en"><strong>Eva Kudová</strong></a><strong> from IOCB Prague and Jitka Viktorová from UCT Prague have identified new androstane-based steroid derivatives that can significantly improve the effectiveness of existing antibiotics against multidrug-resistant </strong><i><strong>Staphylococcus aureus</strong></i><strong>.</strong></p></div></div><div><p>The team screened dozens of natural steroidal hormones and synthetic derivatives to see whether they could block bacterial efflux pumps – mechanisms that bacteria use to eject antibiotics and survive treatment. Two compounds emerged as particularly promising: they inhibited efflux pumps and lowered the effective doses of antibiotics such as ciprofloxacin and erythromycin.</p><p>Further analysis showed that one of the compounds also suppressed genes linked to bacterial virulence. Another key finding is that the most active molecules are non-toxic to human immune cells and showed no detectable endocrine activity, suggesting a favorable safety profile.</p><p>These findings support the idea that rationally designed steroid-based molecules could act as antibiotic adjuvants, helping existing drugs overcome bacterial resistance.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/IOCB_Prague_Steroidal_hormones_and_neurosteroids_novel_therapeutic_strategies_in_bacterial_infections_8e5d2a7b48.jpg" alt="IOCB Prague: Steroidal hormones and neurosteroids – novel therapeutic strategies in bacterial infections" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_IOCB_Prague_Steroidal_hormones_and_neurosteroids_novel_therapeutic_strategies_in_bacterial_infections_8e5d2a7b48.jpg 222w," sizes="100vw" width="1258" height="886"></p><blockquote><h4><strong>Original Article</strong></h4><h4><a target="_blank" rel="noopener noreferrer" href="https://www.sciencedirect.com/science/article/pii/S0223523426001613?via%3Dihub"><strong>Steroidal hormones and neurosteroids - novel therapeutic strategies in bacterial infections: Design, synthesis, and biological evaluation</strong></a></h4><p>Daniela Brdová, Bára Křížkovská, Jan Špaček, Zdeněk Míchal, Eva Jablonská, Ondřej Strnad, Hana Chodounská, Eszter Szánti-Pintér, Marina Morozovová, Václav Hanžl, Jan Tkadlec, Martijn Riool, Jan Lipov, Jitka Viktorová, Eva Kudová&nbsp;</p><p><i><strong>Eur. J. Med. Chem., 2026, 308, 118716</strong></i></p><p><a target="_blank" rel="noopener noreferrer" href="https://doi.org/10.1016/j.ejmech.2026.118716">https://doi.org/10.1016/j.ejmech.2026.118716</a></p><h6>licensed under <a target="_blank" rel="noopener noreferrer" href="https://creativecommons.org/licenses/by/4.0/"><strong>CC-BY 4.0</strong></a></h6></blockquote><h4><strong>Abstract</strong></h4><p>The global rise of antibiotic resistance necessitates novel therapeutic strategies for infectious diseases. Inhibition of bacterial efflux pumps, which contribute to multidrug resistance, represents a promising approach to restore or even increase the efficacy of existing antibiotics. Using fluorescence-based ethidium bromide accumulation, broth microdilution, and checkerboard assays, we evaluated 26 endogenous steroidal hormones and neurosteroids, along with 30 synthetic derivatives, for their ability to enhance antibiotic susceptibility in multidrug-resistant <i>Staphylococcus aureus</i>. Structure-activity relationship analysis identified compounds <strong>13</strong> and <strong>16</strong> as lead candidates, exhibiting strong efflux pump inhibition and marked reductions in the minimum inhibitory concentrations of ciprofloxacin and erythromycin. Both compounds showed additive effects in checkerboard assays. Modifications at C-3 (polar substitution) and C-17 (3α,5β-stereochemistry and nonpolar substitution) were essential for potent efflux inhibition and sensitization, although these modifications were not additive when combined. Transcriptome analysis further revealed that compound <strong>13</strong> significantly downregulated <i>S. aureus</i> virulence-associated genes when administered alone or in combination with antibiotics. Cytotoxicity assessment in human peripheral blood mononuclear cells and receptor transactivation assays for estrogen, androgen, and progesterone receptors indicated that the most active derivatives were non-toxic and lacked detectable endocrine activity, suggesting a favorable safety profile. Overall, these findings support the concept that rationally designed andostane-based steroidal scaffolds can function as competitive bacterial efflux pump inhibitors and serve as potential antibiotic adjuvants to mitigate efflux-mediated resistance.</p><h4><strong>Instrumentation</strong></h4><h5><strong>Structural characterization</strong></h5><ul><li><strong>AVANCE III 400 MHz NMR spectrometer</strong> (Bruker)</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=3&amp;search=LTQ+Orbitrap+XL"><strong>LTQ Orbitrap XL HRMS</strong></a> (Thermo Fisher Scientific, ESI)</li></ul></div>

Steroidal hormones and neurosteroids – novel therapeutic strategies in bacterial infections

<p><strong>Metformin is currently the first-line oral drug of choice for the treatment of type 2 diabetes. It reduces glucose production in the liver, improves tissue sensitivity to insulin, and does not cause weight gain or hypoglycemia, which sets it apart from some other antidiabetic drugs. Moreover, its long-term beneficial effects on the risk of cardiovascular complications and mortality in people with type 2 diabetes have been well established. Researchers from the Institute of Physiology CAS (IPHYS) have identified a new group of blood metabolites that could help physicians objectively monitor whether patients with type 2 diabetes are taking their metformin as prescribed.</strong></p><h4><strong>New biomarkers for metformin use</strong></h4><p>A team led by Tomáš Čajka from the Laboratory of Translational Metabolism at IPHYS analyzed plasma samples from <strong>637 patients with type 2 diabetes treated with metformin</strong> and <strong>143 non-diabetic controls</strong> using advanced metabolomics and lipidomics. Among 614 detected metabolites, they identified five from the group of <strong>N-lactoyl-amino acids </strong>(e.g. N‑lactoyl-phenylalanine), which had previously been seen as unknown signals due to missing reference spectra in databases. The levels of these metabolites in the blood closely reflected the plasma concentrations of metformin. In patients with the highest metformin exposure, the concentrations of these metabolites were up to 7.2 times higher than in controls.</p><h4><strong>A sensitive “fingerprint” of the drug’s effect</strong></h4><p>N-Lactoyl-amino acids are formed in cells by combining lactate and amino acids, thus reflecting the metformin-induced changes in cellular energy metabolism. “<i>Importantly, even though they occur in plasma only at nanomolar concentrations, they reliably distinguish patients who take metformin regularly from those who take it irregularly or not at all</i>,” emphasizes T. Čajka.</p><h4><strong>Metabolomics in practice and international collaboration</strong></h4><p>The study also provides a detailed description of broader metabolic changes in type 2 diabetes, including increases in lactate, organic acids, and branched-chain amino acids, as well as extensive remodelling of the lipid profile. In addition to T. Čajka’s team, collaborators from the Institute for <strong>Clinical and Experimental Medicine in Prague</strong> and the <strong>West Coast Metabolomics Center</strong> (University of California, Davis) also participated in the study.</p><p>The results demonstrate that advanced metabolomics approaches developed at IPHYS within the <strong>CarDia project</strong> can find highly practical applications both in clinical studies and in personalized monitoring of treatment in patients with diabetes.</p><blockquote><h4><strong>The original article</strong></h4><h4><a target="_blank" rel="noopener noreferrer" href="https://ascpt.onlinelibrary.wiley.com/doi/10.1002/cpt.70205"><strong>Untargeted Metabolomics Identifies N-Lactoyl-Amino Acids as Dose-Responsive Plasma Biomarkers of Metformin Adherence in Type 2 Diabetes</strong></a></h4><p>Tomas Cajka, Jiri Hricko, Lucie Rudl Kulhava, Michaela Paucova, Michaela Novakova, Veronika Hola, Stanislava Rakusanova, Oliver Fiehn, Vojtech Skop, Ivana Lankova, Iva Miskova, Terezie Pelikanova, Martin Haluzik</p><p>Clin Pharmacol Ther, 119: 1057-1069</p><p><a target="_blank" rel="noopener noreferrer" href="https://doi.org/10.1002/cpt.70205">https://doi.org/10.1002/cpt.70205</a></p><h6>licensed under <a target="_blank" rel="noopener noreferrer" href="https://creativecommons.org/licenses/by/4.0/"><strong>CC-BY 4.0</strong></a></h6></blockquote><h4><strong>Abstract</strong></h4><p>Metformin is the most widely prescribed antidiabetic drug, yet adherence remains difficult to objectively assess. Using untargeted metabolomics and lipidomics, we analyzed plasma from 637 patients with type 2 diabetes (T2D) with confirmed metformin use and 143 nondiabetic controls, annotating 614 metabolites. Patients were stratified by plasma metformin into sub-therapeutic, therapeutic, and supra-therapeutic groups, and associations were evaluated by multiple linear regression and composite metabolite ranking. Five previously unannotated features were structurally identified as N-lactoyl-amino acids, whose levels correlated strongly with plasma metformin (ρ = 0.42–0.55, P &lt; 0.0001) and increased up to 7.2-fold in the supra-therapeutic group (&gt; 2000 ng/mL). While N-lactoyl-amino acids were consistently detected in the nanomolar range, they still displayed robust and dose-dependent associations with metformin. Broader metabolic changes in T2D included elevated lactate, organic acids, and branched-chain amino acids, together with reduced urea cycle metabolites. Lipidomics showed increases in saturated triacylglycerols and diacylglycerols and decreases in cholesteryl esters, sphingomyelins, and phospholipids. These findings establish N-lactoyl-amino acids as robust, dose-responsive plasma biomarkers of metformin exposure. Despite being up to four orders of magnitude less abundant than their amino acid precursors, they sensitively reflect mitochondrial lactate overflow and pharmacodynamic adaptation, offering objective assessment of adherence.</p>

New blood biomarkers reveal how faithfully diabetes patients take metformin

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The Czech Academy of Sciences (CAS) was established by Act No. 283/1992 Coll. as the Czech successor of the former Czechoslovak Academy of Sciences. It is set up as a complex of 54 public research institutions.

Czech Academy of Sciences

The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences (IOCB Prague) is a leading scientific institution in the Czech Republic, recognized internationally. Its primary mission is basic research in the fields of chemical biology and medicinal chemistry, organic and material oriented chemistry, chemistry of natural compounds, biochemistry and molecular biology, physical chemistry, theoretical chemistry, and analytical chemistry. 

Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences

Organomation, founded in 1959, designs and manufactures high-quality nitrogen evaporators and extraction systems. Known for innovation and durability, their lab instruments are used globally for efficient sample preparation with strong customer support.

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KNAUER AppliChrom® ABOA SuperOH-P Columns for GPC/SEC

Optimally suited for aqueous SEC separations. Aqueous and highly hydrophilic polymeric base material.

<p class="cke-user_style-important"><strong>AppliChrom® SEC columns for biopolymers and aqueous polymers</strong></p><p>Optimally suited for aqueous SEC separations. Aqueous and highly hydrophilic polymeric base material. Polymethacrylate resin, cross-linked with polyhydroxylated ether (surface contains some residual carboxyl functional groups)</p><h4><strong>Properties:</strong></h4><ul><li><strong>Particle size: </strong>7 µm for pore sizes up to 300 Å and 10 µm for pore sizes over 350 Å and the multipore columns</li><li><strong>Stable between:</strong> pH 2–12.5</li><li><strong>Pressure stable: </strong>for 30–70 bar depending on pore size</li><li><strong>Temperature stability:</strong> between 10–85 °C</li><li><strong>Flow rate:</strong> maximum 1 ml/min</li><li>Low column bleed for low detector noise</li><li>Large pore volume for optimal resolution</li><li>Individual pore sizes for individual molecular weight ranges</li><li>Multi-pore technology for a wide range of molecular sizes</li><li>Increased lifetime of SEC columns through combination of proprietary particle and packing technology</li><li><strong>Recommended eluents:</strong> H₂O, buffers</li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Appli_Chrom_ABOA_Super_OH_P_Pore_sizes_4cb72c682d.jpg" alt="KNAUER: AppliChrom® ABOA SuperOH-P - Pore sizes" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Appli_Chrom_ABOA_Super_OH_P_Pore_sizes_4cb72c682d.jpg 216w," sizes="100vw" width="1478" height="1071"></p><h4><strong>Applications</strong></h4><p><strong>Water soluble (bio)polymers up to 40 000 kDa:</strong></p><ul><li>proteins, oligonucleotides, virus, heparin, polyethylene oxide (PEO), polyethylene glycol (PEG), pullulan, maltodextrin, inulin, pectine, polycarboxylate ethers, gelatine, dextranes, polyacrylamide (PAM), PEGylated proteins acrylate dispersions</li></ul><h3><strong>GPC &amp; SEC Columns</strong></h3><p><strong>GPC &amp; SEC systems offer solutions for various applications and laboratories</strong></p><p>Gel permeation chromatography (GPC) and size exclusion chromatography (SEC) separate analytes by size using special columns with a porous matrix. 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Therefore we offer a <strong>wide range of pore sizes</strong> (35, 100, 150, 250, 350, 500, 1000, 1500, 10E5, 10E6, 10E7 Å) and <strong>several particle sizes</strong> (5, 7, 10, 12, 20 µm) as a choice to customize for every application task.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Size_Exclusion_principle_2a432edcc1.webp" alt="KNAUER: Size Exclusion - principle" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Size_Exclusion_principle_2a432edcc1.webp 228w," sizes="100vw" width="1024" height="700"></p><h3><strong>KNAUER AppliChrom® ABOA columns for aqueous SEC, organic GPC, and special applications</strong></h3><ul><li>AppliChrom® ABOA StyDiViBe Series GPC-columns for GPC analysis of organic molecules using THF, toluene, chloroform.</li><li>AppliChrom ABOA SuperOH-P Series for aqueous GPC/SEC-analysis of mainly neutral and anionic polymers like heparins, polysaccharides, PEO,<br>PEG,....</li><li>AppliChrom® ABOA DMSO-Phil-P Series for DMSO GPC/SEC analysis (humic substances, UF/MUF-glue, p-NIPA, many polycondensates, protein from pea or leguminosae,...)</li><li>AppliChrom® ABOA DMAc-Phil-P Series for GPC/ SEC analysis in DMAc, DMF, NMP. Good for many medium polar substances, polyoxazolines, lignin,...</li><li>AppliChrom® ABOA Cat-Phil-P Series for aqueous GPC/SEC-analysis of special aminic and polycationic polymers like p-DADMAc, PEI/ polyethylenimin, chitosan, copolymers with polyaminofunctions, but also useful for polyanions or neutral polymers like heparin or PEO/PEG, dextran or pullulan.</li><li><strong>Seperation Ranges: </strong>100–50 000 000 Da</li></ul><h4><strong>You decide between classical GPC/SEC columns with conventional mixed pore technology or AppliChrom® BPT technology:</strong></h4><p>Separate oligomers and polymers with the new GPC media line from AppliChrom® BPT synthesis technology for large range, high resolution separations with increased accuracy in calibration (patent pending).</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Appli_Chrom_ABOA_columns_58d5d380f6.jpg" alt="KNAUER: AppliChrom® ABOA columns." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Appli_Chrom_ABOA_columns_58d5d380f6.jpg 245w," sizes="100vw" width="1379" height="718"></p>

KNAUER AppliChrom® ABOA RPpetide GPC Columns for RP

AppliChrom® Polymer based reversed phase (RP) columns to reversed phase (RP) separation with orthogonal selectivity to silica based columns.

<p class="cke-user_style-important"><strong>AppliChrom® Polymer based reversed phase (RP) columns</strong></p><h4><strong>Properties:</strong></h4><ul><li>Rigid, spherical styrenedivinylbenzene copolymer&nbsp;</li><li><strong>Particle sizes between:</strong> 3 to 30 μm</li><li><strong>Pore sizes of: </strong>100–1 000 Å</li><li>Reversed Phase (RP) separation with orthogonal selectivity to silica based columns</li><li>Improved chemical stability</li><li><strong>Stable between:</strong> pH 1.5–14</li><li><strong>Temperature stability: </strong>10–90 °C</li><li><strong>Stable towards pressures:</strong> up to 150 bar</li><li>Low backpressure with high plate counts, ideal for preparative applications</li><li>Low column bleed for low detector noise</li><li>Up and down scaling ensured beteween analytical RP-HPLC and preparative process chromatography</li><li><strong>Recommended eluents:</strong> &nbsp;H₂O/ACN or H₂O/MeOH with up to 1 % TFA, FA or NaOH additive</li></ul><h4><strong>Applications</strong></h4><ul><li>Polar peptides, proteins or vitamins, hydrophobic amines</li></ul><h3><strong>GPC &amp; SEC Columns</strong></h3><p><strong>GPC &amp; SEC systems offer solutions for various applications and laboratories</strong></p><p>Gel permeation chromatography (GPC) and size exclusion chromatography (SEC) separate analytes by size using special columns with a porous matrix. The basic separation principle is based on the fact that smaller molecules penetrate these pores more strongly and therefore move more slowly through the matrix than larger molecules. GPC/SEC is often used as gentle and powerful purification technique or for quality control in research and development. Typical target molecules are polymers, dissolved in organic solvents for GPC, and macro biomolecules like proteins, antibodies or polysaccharides, dissolved in aqueous eluents for SEC.</p><p>Separation is facilitated by selecting optimal particle and pore sizes. Therefore we offer a <strong>wide range of pore sizes</strong> (35, 100, 150, 250, 350, 500, 1000, 1500, 10E5, 10E6, 10E7 Å) and <strong>several particle sizes</strong> (5, 7, 10, 12, 20 µm) as a choice to customize for every application task.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Size_Exclusion_principle_2a432edcc1.webp" alt="KNAUER: Size Exclusion - principle" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Size_Exclusion_principle_2a432edcc1.webp 228w," sizes="100vw" width="1024" height="700"></p><h3><strong>KNAUER AppliChrom® ABOA columns for aqueous SEC, organic GPC, and special applications</strong></h3><ul><li>AppliChrom® ABOA StyDiViBe Series GPC-columns for GPC analysis of organic molecules using THF, toluene, chloroform.</li><li>AppliChrom ABOA SuperOH-P Series for aqueous GPC/SEC-analysis of mainly neutral and anionic polymers like heparins, polysaccharides, PEO,<br>PEG,....</li><li>AppliChrom® ABOA DMSO-Phil-P Series for DMSO GPC/SEC analysis (humic substances, UF/MUF-glue, p-NIPA, many polycondensates, protein from pea or leguminosae,...)</li><li>AppliChrom® ABOA DMAc-Phil-P Series for GPC/ SEC analysis in DMAc, DMF, NMP. Good for many medium polar substances, polyoxazolines, lignin,...</li><li>AppliChrom® ABOA Cat-Phil-P Series for aqueous GPC/SEC-analysis of special aminic and polycationic polymers like p-DADMAc, PEI/ polyethylenimin, chitosan, copolymers with polyaminofunctions, but also useful for polyanions or neutral polymers like heparin or PEO/PEG, dextran or pullulan.</li><li><strong>Seperation Ranges: </strong>100–50 000 000 Da</li></ul><h4><strong>You decide between classical GPC/SEC columns with conventional mixed pore technology or AppliChrom® BPT technology:</strong></h4><p>Separate oligomers and polymers with the new GPC media line from AppliChrom® BPT synthesis technology for large range, high resolution separations with increased accuracy in calibration (patent pending).</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Appli_Chrom_ABOA_columns_58d5d380f6.jpg" alt="KNAUER: AppliChrom® ABOA columns." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Appli_Chrom_ABOA_columns_58d5d380f6.jpg 245w," sizes="100vw" width="1379" height="718"></p>

KNAUER AppliChrom® ABOA VivoSep SEC Columns

AppliChrom® SEC columns for water soluble (bio)polymers are multi hydrophilic layered SEC media for highest efficiency and low interaction.

<p class="cke-user_style-important"><strong>AppliChrom® SEC columns for water soluble (bio)polymers</strong></p><h4><strong>Properties:</strong></h4><ul><li>Multi hydrophilic layered SEC media for highest efficiency and low interaction</li><li><strong>Available seperation ranges:</strong> from small molecules up to 5 500 kDa</li><li><strong>Temperature stability: </strong>10-90 °C</li><li><strong>Stable between: </strong>pH 2–10</li><li><strong>Pressure stability:</strong> up to 200 bar</li><li>Simple adaptation from HPLC to SEC with stainless steel instruments</li><li>Versatile tool for accurate protein molecular weight or size determination</li><li>Low column bleed for low detector noise</li><li>Increased lifetime of SEC columns through combination of proprietary particle and packing technology</li><li><strong>Recommended eluents:</strong> H₂O, buffers</li></ul><h4><strong>Applications</strong></h4><ul><li>Water soluble proteins, humic substances</li></ul><h3><strong>GPC &amp; SEC Columns</strong></h3><p><strong>GPC &amp; SEC systems offer solutions for various applications and laboratories</strong></p><p>Gel permeation chromatography (GPC) and size exclusion chromatography (SEC) separate analytes by size using special columns with a porous matrix. The basic separation principle is based on the fact that smaller molecules penetrate these pores more strongly and therefore move more slowly through the matrix than larger molecules. GPC/SEC is often used as gentle and powerful purification technique or for quality control in research and development. Typical target molecules are polymers, dissolved in organic solvents for GPC, and macro biomolecules like proteins, antibodies or polysaccharides, dissolved in aqueous eluents for SEC.</p><p>Separation is facilitated by selecting optimal particle and pore sizes. Therefore we offer a <strong>wide range of pore sizes</strong> (35, 100, 150, 250, 350, 500, 1000, 1500, 10E5, 10E6, 10E7 Å) and <strong>several particle sizes</strong> (5, 7, 10, 12, 20 µm) as a choice to customize for every application task.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Size_Exclusion_principle_2a432edcc1.webp" alt="KNAUER: Size Exclusion - principle" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Size_Exclusion_principle_2a432edcc1.webp 228w," sizes="100vw" width="1024" height="700"></p><h3><strong>KNAUER AppliChrom® ABOA columns for aqueous SEC, organic GPC, and special applications</strong></h3><ul><li>AppliChrom® ABOA StyDiViBe Series GPC-columns for GPC analysis of organic molecules using THF, toluene, chloroform.</li><li>AppliChrom ABOA SuperOH-P Series for aqueous GPC/SEC-analysis of mainly neutral and anionic polymers like heparins, polysaccharides, PEO,<br>PEG,....</li><li>AppliChrom® ABOA DMSO-Phil-P Series for DMSO GPC/SEC analysis (humic substances, UF/MUF-glue, p-NIPA, many polycondensates, protein from pea or leguminosae,...)</li><li>AppliChrom® ABOA DMAc-Phil-P Series for GPC/ SEC analysis in DMAc, DMF, NMP. Good for many medium polar substances, polyoxazolines, lignin,...</li><li>AppliChrom® ABOA Cat-Phil-P Series for aqueous GPC/SEC-analysis of special aminic and polycationic polymers like p-DADMAc, PEI/ polyethylenimin, chitosan, copolymers with polyaminofunctions, but also useful for polyanions or neutral polymers like heparin or PEO/PEG, dextran or pullulan.</li><li><strong>Seperation Ranges: </strong>100–50 000 000 Da</li></ul><h4><strong>You decide between classical GPC/SEC columns with conventional mixed pore technology or AppliChrom® BPT technology:</strong></h4><p>Separate oligomers and polymers with the new GPC media line from AppliChrom® BPT synthesis technology for large range, high resolution separations with increased accuracy in calibration (patent pending).</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Appli_Chrom_ABOA_columns_58d5d380f6.jpg" alt="KNAUER: AppliChrom® ABOA columns." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Appli_Chrom_ABOA_columns_58d5d380f6.jpg 245w," sizes="100vw" width="1379" height="718"></p>

KNAUER AppliChrom® ABOA Cat-Phil SEC Columns

Interaction-free pure GPC & SEC base material with focus on polycationic, polyelectrolytic or funktional amine analytes

<p class="cke-user_style-important"><strong>AppliChrom® SEC columns for neutral, anionic and additional cationic polymers</strong></p><h4><strong>Properties:</strong></h4><ul><li>Interaction-free pure GPC &amp; SEC base material with focus on polycationic, polyelectrolytic or funktional amine analytes</li><li>No salt addition is needed to surpress surface adsorption</li><li>No ion exclusion phenomena</li><li>Possible to be used in universal calibration &amp; accurate molecular weight determination even for small polycationic molecules</li><li><strong>Temperature stability between:</strong> 10–90 °C</li><li><strong>Stable with:</strong> pH 2–10</li><li><strong>Simple, reliable and robust GPC &amp; SEC calibration</strong> from dextrans, pullulans et al.</li><li><strong>Low column bleed </strong>for low detector gain for improved refractive index, light scattering or viscosity detection</li><li><strong>Large volume</strong> and optimized mass transfer for polymers with optimized resolution</li><li><strong>Low cost due to long column lifetime</strong> - result of the combination of optimized particle and packing technology</li><li><strong>Recommended eluents:</strong> H₂O, buffers</li></ul><h4><strong>Applications</strong></h4><p><strong>Water soluble analytes like:</strong></p><ul><li>polycations, polyamines (chitosanes), polyethylenoxides, polysaccharides, polyanions (heparins, pectins), polyethylene oxide (PEO), polyethylene glycol (PEG), Ppolyethyleneimins (PEI), polyvinylimidazole</li></ul><h3><strong>GPC &amp; SEC Columns</strong></h3><p><strong>GPC &amp; SEC systems offer solutions for various applications and laboratories</strong></p><p>Gel permeation chromatography (GPC) and size exclusion chromatography (SEC) separate analytes by size using special columns with a porous matrix. The basic separation principle is based on the fact that smaller molecules penetrate these pores more strongly and therefore move more slowly through the matrix than larger molecules. GPC/SEC is often used as gentle and powerful purification technique or for quality control in research and development. Typical target molecules are polymers, dissolved in organic solvents for GPC, and macro biomolecules like proteins, antibodies or polysaccharides, dissolved in aqueous eluents for SEC.</p><p>Separation is facilitated by selecting optimal particle and pore sizes. Therefore we offer a <strong>wide range of pore sizes</strong> (35, 100, 150, 250, 350, 500, 1000, 1500, 10E5, 10E6, 10E7 Å) and <strong>several particle sizes</strong> (5, 7, 10, 12, 20 µm) as a choice to customize for every application task.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Size_Exclusion_principle_2a432edcc1.webp" alt="KNAUER: Size Exclusion - principle" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Size_Exclusion_principle_2a432edcc1.webp 228w," sizes="100vw" width="1024" height="700"></p><h3><strong>KNAUER AppliChrom® ABOA columns for aqueous SEC, organic GPC, and special applications</strong></h3><ul><li>AppliChrom® ABOA StyDiViBe Series GPC-columns for GPC analysis of organic molecules using THF, toluene, chloroform.</li><li>AppliChrom ABOA SuperOH-P Series for aqueous GPC/SEC-analysis of mainly neutral and anionic polymers like heparins, polysaccharides, PEO,<br>PEG,....</li><li>AppliChrom® ABOA DMSO-Phil-P Series for DMSO GPC/SEC analysis (humic substances, UF/MUF-glue, p-NIPA, many polycondensates, protein from pea or leguminosae,...)</li><li>AppliChrom® ABOA DMAc-Phil-P Series for GPC/ SEC analysis in DMAc, DMF, NMP. Good for many medium polar substances, polyoxazolines, lignin,...</li><li>AppliChrom® ABOA Cat-Phil-P Series for aqueous GPC/SEC-analysis of special aminic and polycationic polymers like p-DADMAc, PEI/ polyethylenimin, chitosan, copolymers with polyaminofunctions, but also useful for polyanions or neutral polymers like heparin or PEO/PEG, dextran or pullulan.</li><li><strong>Seperation Ranges: </strong>100–50 000 000 Da</li></ul><h4><strong>You decide between classical GPC/SEC columns with conventional mixed pore technology or AppliChrom® BPT technology:</strong></h4><p>Separate oligomers and polymers with the new GPC media line from AppliChrom® BPT synthesis technology for large range, high resolution separations with increased accuracy in calibration (patent pending).</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Appli_Chrom_ABOA_columns_58d5d380f6.jpg" alt="KNAUER: AppliChrom® ABOA columns." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Appli_Chrom_ABOA_columns_58d5d380f6.jpg 245w," sizes="100vw" width="1379" height="718"></p>

KNAUER AppliChrom® ABOA StyDiViBe GPC Columns

Organic polystyrene-divinylbenzene copolymer base material with high porosity for high resolution

<p class="cke-user_style-important"><strong>AppliChrom® GPC columns for GPC analysis of organic molecules with THF, toluene, chloroform</strong></p><h4><strong>Properties:</strong></h4><ul><li>Organic polystyrene-divinylbenzene copolymer base material with high porosity for high resolution</li><li><strong>High pressure stability: </strong>up to 150 bar</li><li><strong>Temperature stable:</strong> between 10-145 °C</li><li><strong>GPC range:</strong> from 0.1 up to 50 000 kDa</li><li><strong>Low column bleed</strong> for low detector noise</li><li><strong>High purity</strong> to eliminate adsorptive effects and combine pure GPC with long lifetime</li><li><strong>Large calibration ranges</strong> for several decades due to the unique process of BPT technology</li><li>Range of individual porosities that can be used individually or in combination</li><li><strong>Optimized for: </strong>1 ml/min flow rate for 8 mm ID columns</li><li><strong>High level of reproducibility</strong> and peak precision due to the advanced packing procedure</li><li><strong>Recommended eluents:</strong> THF, Toluene, CHCl₃, dichlorbenzene, hexane/EtOAc (10:90, V:V)</li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Appli_Chrom_ABOA_Sty_Di_Vi_Be_P_Molecular_sizes_range_ca9a682d2e.jpg" alt="KNAUER: AppliChrom® ABOA StyDiViBe-P - Molecular sizes range" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Appli_Chrom_ABOA_Sty_Di_Vi_Be_P_Molecular_sizes_range_ca9a682d2e.jpg 235w," sizes="100vw" width="1072" height="712"></p><h4><strong>Applications</strong></h4><p><strong>Hydrophobic oligomers or polymers like:</strong></p><ul><li>PVC, PMMA, polystyrene, epoxy resins, polyesters, bisphenol A resins</li></ul><h3><strong>GPC &amp; SEC Columns</strong></h3><p><strong>GPC &amp; SEC systems offer solutions for various applications and laboratories</strong></p><p>Gel permeation chromatography (GPC) and size exclusion chromatography (SEC) separate analytes by size using special columns with a porous matrix. The basic separation principle is based on the fact that smaller molecules penetrate these pores more strongly and therefore move more slowly through the matrix than larger molecules. GPC/SEC is often used as gentle and powerful purification technique or for quality control in research and development. Typical target molecules are polymers, dissolved in organic solvents for GPC, and macro biomolecules like proteins, antibodies or polysaccharides, dissolved in aqueous eluents for SEC.</p><p>Separation is facilitated by selecting optimal particle and pore sizes. Therefore we offer a <strong>wide range of pore sizes</strong> (35, 100, 150, 250, 350, 500, 1000, 1500, 10E5, 10E6, 10E7 Å) and <strong>several particle sizes</strong> (5, 7, 10, 12, 20 µm) as a choice to customize for every application task.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Size_Exclusion_principle_2a432edcc1.webp" alt="KNAUER: Size Exclusion - principle" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Size_Exclusion_principle_2a432edcc1.webp 228w," sizes="100vw" width="1024" height="700"></p><h3><strong>KNAUER AppliChrom® ABOA columns for aqueous SEC, organic GPC, and special applications</strong></h3><ul><li>AppliChrom® ABOA StyDiViBe Series GPC-columns for GPC analysis of organic molecules using THF, toluene, chloroform.</li><li>AppliChrom ABOA SuperOH-P Series for aqueous GPC/SEC-analysis of mainly neutral and anionic polymers like heparins, polysaccharides, PEO,<br>PEG,....</li><li>AppliChrom® ABOA DMSO-Phil-P Series for DMSO GPC/SEC analysis (humic substances, UF/MUF-glue, p-NIPA, many polycondensates, protein from pea or leguminosae,...)</li><li>AppliChrom® ABOA DMAc-Phil-P Series for GPC/ SEC analysis in DMAc, DMF, NMP. Good for many medium polar substances, polyoxazolines, lignin,...</li><li>AppliChrom® ABOA Cat-Phil-P Series for aqueous GPC/SEC-analysis of special aminic and polycationic polymers like p-DADMAc, PEI/ polyethylenimin, chitosan, copolymers with polyaminofunctions, but also useful for polyanions or neutral polymers like heparin or PEO/PEG, dextran or pullulan.</li><li><strong>Seperation Ranges: </strong>100–50 000 000 Da</li></ul><h4><strong>You decide between classical GPC/SEC columns with conventional mixed pore technology or AppliChrom® BPT technology:</strong></h4><p>Separate oligomers and polymers with the new GPC media line from AppliChrom® BPT synthesis technology for large range, high resolution separations with increased accuracy in calibration (patent pending).</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Appli_Chrom_ABOA_columns_58d5d380f6.jpg" alt="KNAUER: AppliChrom® ABOA columns." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Appli_Chrom_ABOA_columns_58d5d380f6.jpg 245w," sizes="100vw" width="1379" height="718"></p>

Waters ACQUITY APC Columns

Waters ACQUITY Advanced Polymer Chromatography (APC) Columns with novel capabilities for chromatographic efficiency, speed and resolution that cannot be matched by conventional GPC methods.

<h4><strong>ACQUITY APC AQ BEH Column</strong></h4><p>ACQUITY APC AQ columns are designed to provide highly efficient size-based separations for water soluble polymer characterization. The sorbent uses patented Ethylene Bridge Hybrid (BEH) technology to provide a mechanical strong packed bed that resists shinking and swelling for easy mobile phase solvent switching. The expected molecular weight range for this column is approximatley 1, 000 - 30, 000 g/mole.</p><h4><strong>Specifications</strong></h4><ul><li><strong>Separation Mode:</strong> SEC/GPC</li><li><strong>Particle Substrate: </strong>Hybrid</li><li><strong>pH Range Min:</strong> 1 pH</li><li><strong>pH Range Max: </strong>8 pH</li><li><strong>Endcapped: </strong>No</li><li><strong>Silanol Activity: </strong>Medium</li><li><strong>Molecular Weight Range Min:</strong> 1000</li><li><strong>Molecular Weight Range Max:</strong> 30000</li><li><strong>Particle Shape: </strong>Spherical</li><li><strong>Particle Size:</strong> 1,7 µm &nbsp;/ 2.5 µm&nbsp;</li><li><strong>Endfitting Type: </strong>Parker-style</li><li><strong>System:</strong> APC</li><li><strong>Particle Technology:</strong> BEH</li><li><strong>Technique: </strong>SEC</li></ul><h4><strong>ACQUITY APC XT BEH Column</strong></h4><p>ACQUITY APC XT columns are optimized to provide highly efficient size-based separations for organic solvent soluble polymer characterization. The sorbent uses patented Ethylene Bridge Hybrid (BEH) technology to provide a mechanical strong packed bed that resists shinking and swelling for easy mobile phase solvent switching.The expected molecular weight range for this column is approximatley 1,000 - 30,000 g/mole.</p><h4><strong>Specifications</strong></h4><ul><li><strong>Separation Mode:</strong> SEC/GPC</li><li><strong>Particle Substrate: </strong>Hybrid</li><li><strong>pH Range Min:</strong> 1 pH</li><li><strong>pH Range Max: </strong>12 pH</li><li><strong>Endcapped: </strong>No</li><li><strong>Silanol Activity: </strong>Low</li><li><strong>Molecular Weight Range Min:</strong> 1000</li><li><strong>Molecular Weight Range Max:</strong> 30000</li><li><strong>Particle Shape: </strong>Spherical</li><li><strong>Particle Size:</strong> 1,7 µm &nbsp;/ 2.5 µm&nbsp;</li><li><strong>Endfitting Type: </strong>Parker-style</li><li><strong>System:</strong> APC</li><li><strong>Particle Technology:</strong> BEH</li><li><strong>Technique: </strong>GPC</li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_APC_AQ_BEH_Column_0c0d837b73.jpeg" alt="Waters: ACQUITY APC Column" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_APC_AQ_BEH_Column_0c0d837b73.jpeg 234w," sizes="100vw" width="660" height="440"></p><h3><strong>ACQUITY APC Columns</strong></h3><h4><strong>Achieve superior speed and resolution for polymer characterization</strong></h4><p>Achieving superior performance and reliability with high resolution polymer characterization can be a challenge. <strong>ACQUITY Advanced Polymer Chromatography (APC) Columns</strong> are designed for polymer scientists like you, with novel capabilities for chromatographic efficiency, speed and resolution that cannot be matched by conventional GPC methods. With these columns, you can quantify and characterize polymer samples with confidence and accuracy while maximizing productivity.</p><p>The <strong>Ethylene Bridged Hybrid (BEH) particles</strong> used in ACQUITY APC Columns enable rapid solvent switching and the ability to use multiple conditions for the same bank of columns. Conventional polymeric stationary phases are dedicated to a single set of analytical conditions and solvent because the chromatographic bed is vulnerable to shrinking and swelling. By eliminating this undesirable behavior, ACQUITY APC Columns allow for maximum robustness and method development flexibility.</p><h4><strong>Overview</strong></h4><ul><li>Eliminate the shrinking and swelling that often occurs with polymeric stationary phases upon solvent switching with a stable chromatographic column bed&nbsp;</li><li>Achieve unmatched separation speed, resolution, and chromatographic efficiency from optimized pore volumes and particle size</li><li>Meet workflow requirements with 1.7 and 2.5 μm columns for organic and aqueous size-based separation</li><li>Achieve industry-leading column-to-column reproducibility with exceptionally reliable columns from a tightly controlled column manufacturing process</li><li><strong>Recommended Use: </strong>For rapid and accurate chromatographic characterization of synthetic polymer and macromolecular species.&nbsp;</li></ul><h4><strong>ACQUITY APC Column Featured Technologies</strong></h4><h5><strong>BEH Technology</strong></h5><ul><li>Rugged hybrid organic/inorganic base particle</li><li>Improved peak shape for bases- low silanol activity</li><li>Wider operating pH range for method development flexibility</li><li>Mechanical strength for maximum column efficiency at UHPLC operating pressures</li></ul><h4><strong>ACQUITY APC Column Characteristics</strong></h4><h5><strong>ACQUITY APC XT Columns</strong></h5><ul><li>Designed to provide high efficiency sized-based separations for organic soluble polymer characterization</li><li>Uses BEH particle technology</li><li>Stable column bed that resists shrinking and swelling for easy mobile-phase solvent switching</li><li>Features an extended temperature range up to 90 °C</li><li>Designed for organic solvent-based separations</li></ul><h5><strong>ACQUITY APC AQ Columns</strong></h5><ul><li>Designed to provide high efficiency sized-based separations for water soluble polymer characterization</li><li>Uses BEH particle technology</li><li>Robust separations up to 45 °C</li><li>Designed for aqueous-soluble polymer separations</li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_ACQUITY_APC_Columns_2268ceb5f5.jpeg" alt="Waters: ACQUITY APC Columns" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_ACQUITY_APC_Columns_2268ceb5f5.jpeg 234w," sizes="100vw" width="1024" height="682"></p><h4><strong>Unprecedented capacity for rapid solvent switching</strong></h4><p>Use multiple conditions for the same column bank with rapid solvent switching using the rigid hybrid particles in ACQUITY APC Chromatography Columns. Conventional polymeric phases are often dedicated to single analysis conditions because the chromatographic bed is vulnerable to shrinking and swelling that can be potentially harmful to the column. By eliminating this constraint, ACQUITY APC Chromatography Columns provide more freedom for method development and deliver advanced polymer characterization for a diverse range of samples.</p><h4><strong>Reduce calibration time by a factor of 3-5x and increase resolution</strong></h4><p>With long conventional Gel Permeation Chromatography (GPC) run times of up to one hour or more, analyses of standards and samples can be quite time-consuming. In addition to long GPC run times, the large extra-column volume of conventional GPC systems can result in peak bandspreading, reducing the resolution and thus accuracy of the calibration points. Combined with the lower dispersion ACQUITY APC System, small particle ACQUITY APC Columns deliver less bandspreading and narrower, sharper peaks compared to the conventional GPC system. Additionally, robust sub-3-µm APC Column Technology supports higher flow rate and backpressures, thereby improving resolution.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Waters_A_comparison_of_run_times_and_resolution_for_polystyrene_standards_Mp_100_K_10_K_and_1_K_on_a_conventional_GPC_system_and_the_ACQUITY_APC_System_37cfb15ed5.jpeg" alt="Waters: A comparison of run times and resolution for polystyrene standards (Mp: 100K, 10K, and 1K) on a conventional GPC system and the ACQUITY APC System. " srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Waters_A_comparison_of_run_times_and_resolution_for_polystyrene_standards_Mp_100_K_10_K_and_1_K_on_a_conventional_GPC_system_and_the_ACQUITY_APC_System_37cfb15ed5.jpeg 234w," sizes="100vw" width="1024" height="682"></p><h4><strong>Ensure reproducible column performance</strong></h4><p>Reproducible column performance is one of the most critical factors for achieving long-term method reliability during polymer characterization. Each step of our column manufacturing process is monitored and tightly controlled to maintain unmatched product reproducibility. Every test, from raw material characterization to final batch analysis, is designed to ensure that ACQUITY APC Columns perform the same from column-to-column, batch-to-batch, and year-to-year.</p>

Thermo Scientific Acclaim SEC-1000 HPLC Columns

Separate water-soluble polymers and oligomers with Thermo Scientific™ Acclaim™ SEC-1000 Size Exclusion HPLC Columns. 

<p><strong>Separate water-soluble polymers and oligomers with Thermo Scientific™ Acclaim™ SEC-1000 Size Exclusion HPLC Columns. These resin-based, high-performance, size-exclusion chromatography columns cover molecular weight range: 7μm, 1000Å. The combination of a proprietary mono-dispersed multi-pore hydrophilic resin and small particle size provides high-resolution and good linearity of the calibration curve with no inflection points for accurate, reliable analysis of a variety of water-soluble polymers.</strong></p><p>The Acclaim SEC-1000 LC column is calibrated from 1,000 to 1,000,000 Daltons and can characterize high molecular weight polymers.</p><h5><strong>High-Performance Analysis of Water-Soluble Polymers</strong></h5><ul><li>High-resolution analysis at reduced solvent consumption in available 4.6 x 300mm dimension</li><li>Stable surface bonding leads to low column bleed and enhances compatibility with UV, RI, MS, ELSD and Thermo Scientific Dionex™ Corona™ Charged Aerosol Detectors</li></ul><h4><strong>Specifications</strong></h4><ul><li><strong>Column type:</strong> Size exclusion</li><li><strong>Endcapped:</strong> yes</li><li><strong>Max. Pressure:</strong> 600 psi (40 bar)</li><li><strong>Packing Material:</strong> Spherical, Fully Porous Polymer</li><li><strong>Temperature:</strong> 60°C</li><li><strong>Phase:</strong> Size exclusion</li><li><strong>Pore Size: </strong>1000 Å</li><li><strong>pH: </strong>2 to 12</li></ul><h4><strong>About the Acclaim Family of HPLC Columns</strong></h4><p>Achieve the high standards set by modern HPLC and LC/MS methods with the Acclaim family of reversed-phase columns. These silica-based columns with advanced column bonding and endcapping technologies provide complementary selectivity, high column efficiencies, and ultra-high resolution for a wide variety of applications.</p><ul><li>Broad spectrum of stationary phases, including conventional C8 and C18 phases, polar embedded phases, and specialty phases including wide-pore, are available to meet your specific application needs</li><li>Performance tested to ensure high quality and reliability for pharmaceutical, biopharmaceutical, environmental, food, and other industrial chromatographic separations</li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Thermo_Fisher_Scientific_Acclaim_column_Broad_range_of_HPLC_and_UHPLC_columns_2ec9c98a86.jpg" alt="Thermo Fisher Scientific: Broad range of HPLC and UHPLC columns" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Thermo_Fisher_Scientific_Acclaim_column_Broad_range_of_HPLC_and_UHPLC_columns_2ec9c98a86.jpg 191w," sizes="100vw" width="1172" height="958"></p>

Thermo Scientific Acclaim SEC-300 HPLC Columns

Separate water-soluble polymers and oligomers with Thermo Scientific Acclaim SEC-300 Size Exclusion Chromatography HPLC Columns. 

<p><strong>Separate water-soluble polymers and oligomers with Thermo Scientific™ Acclaim™ SEC-300 Size Exclusion Chromatography HPLC Columns. These resin-based, high-performance, size-exclusion chromatography columns cover molecular weight range: 5μm, 300Å. The combination of a proprietary mono-dispersed multi-pore hydrophilic resin and small particle size provides high-resolution and good linearity of the calibration curve with no inflection points for accurate, reliable analysis of a variety of water-soluble polymers.</strong></p><p>The Acclaim SEC-300 column is calibrated from 100 to 50,000 Daltons and offers good resolution for lower molecular weight polymers or oligomers.</p><h5><strong>High-Performance Analysis of Water-Soluble Polymers</strong></h5><ul><li>High-resolution analysis at reduced solvent consumption in available 4.6 x 300mm dimension</li><li>Stable surface bonding leads to low column bleed and enhances compatibility with UV, RI, MS, ELSD and Thermo Scientific Dionex™ Corona™ Charged Aerosol Detectors</li></ul><h4><strong>Specifications</strong></h4><ul><li><strong>Column type:</strong> Size exclusion</li><li><strong>Endcapped:</strong> yes</li><li><strong>Max. Pressure:</strong> 1200 psi (80 bar)</li><li><strong>Packing Material:</strong> Spherical, Fully Porous Polymer</li><li><strong>Temperature:</strong> 60°C</li><li><strong>Phase:</strong> Size exclusion</li><li><strong>Pore Size: </strong>300 Å</li><li><strong>pH: </strong>2 to 12</li></ul><h4><strong>About the Acclaim Family of HPLC Columns</strong></h4><p>Achieve the high standards set by modern HPLC and LC/MS methods with the Acclaim family of reversed-phase columns. These silica-based columns with advanced column bonding and endcapping technologies provide complementary selectivity, high column efficiencies, and ultra-high resolution for a wide variety of applications.</p><ul><li>Broad spectrum of stationary phases, including conventional C8 and C18 phases, polar embedded phases, and specialty phases including wide-pore, are available to meet your specific application needs</li><li>Performance tested to ensure high quality and reliability for pharmaceutical, biopharmaceutical, environmental, food, and other industrial chromatographic separations</li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Thermo_Fisher_Scientific_Acclaim_column_Broad_range_of_HPLC_and_UHPLC_columns_2ec9c98a86.jpg" alt="Thermo Fisher Scientific: Broad range of HPLC and UHPLC columns" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Thermo_Fisher_Scientific_Acclaim_column_Broad_range_of_HPLC_and_UHPLC_columns_2ec9c98a86.jpg 191w," sizes="100vw" width="1172" height="958"></p>

Thermo Scientific SurePac Bio 550 SEC MDi HPLC Columns

SurePac™ Bio 550 SEC MDi™ column delivers high-resolution, reproducible AAV size-based separations with 3 μm silica, 550 Å pores, and bioinert hardware for optimal recovery and QC reliability.

<p><strong>Experience the future of Size-Exclusion Chromatography (SEC) with SurePac™ Bio 550 SEC MDi™ analytical columns and guards exclusively designed to deliver robust and reproducible performance at high resolution and throughput to accelerate your therapeutics analysis process. The column's groundbreaking MDi™ technology integrates our advanced 3 μm monodisperse silica particle platform with bioinert hardware to ensure superior reliability for best sample recovery. SurePac™ Bio 550 SEC MDi™ column is ideal for AAV gene therapeutics analysis and offers excellent selectivity due to the dedicated smaller particle (3 μm) size combined with wide-pore (550Å) for separating monomeric AAVs from aggregates based on their size differences.</strong></p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Thermo_Scientific_Sure_Pac_Bio_550_SEC_M_Di_HPLC_Columns_3_8391a584e0.jpg" alt="Thermo Scientific: SEM image of 3μm monodisperse silica particles (left) vs. 3 μm polydisperse particles (right)" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Thermo_Scientific_Sure_Pac_Bio_550_SEC_M_Di_HPLC_Columns_3_8391a584e0.jpg 245w," sizes="100vw" width="1023" height="508"></p><p>SurePac Bio 550 SEC MDi columns and guards are based on high-purity, spherical, porous (550 Å), 3 μm monodispersed silica particles that are covalently modified with a proprietary diol hydrophilic layer. This unique design yields shorter diffusion distances and enhanced reproducible mass transfer and narrower peaks. The consistent size of these particles facilitates precise control over media synthesis and column packing, significantly improving column-to-column and lot-to-lot reproducibility. The columns are housed in a hydrophilic bioinert-coated stainless-steel hardware to eliminate secondary interactions, ensuring optimal performance during the initial injection process.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Thermo_Scientific_Sure_Pac_Bio_550_SEC_M_Di_HPLC_Columns_043f131056.jpg" alt="Thermo Scientific: SurePac Bio 550 SEC MDi HPLC Columns" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Thermo_Scientific_Sure_Pac_Bio_550_SEC_M_Di_HPLC_Columns_043f131056.jpg 156w," sizes="100vw" width="650" height="650"></p><ul><li>Ideal for AAV gene therapy characterization and quality control assessment due to selectivity of the dedicated smaller particle (3 μm) combined with wide-pore (550Å) size</li><li>Superior column-to-column and lot-to-lot reproducibility eliminates column variability as a concern in stability and QA/QC testing</li><li>High-efficiency peaks with excellent recovery</li><li>Higher resolution and throughput for fast turnaround time without sacrificing performance</li><li>Bioinert hardware to eliminate analyte adsorption</li></ul><h4><strong>Specifications</strong></h4><ul><li><strong>Max. Pressure: </strong>3500 psi (241 bar)</li><li><strong>Packing Material:</strong> Monodisperse Silica Resin</li><li><strong>Flow Rate: </strong>0.6 mL/min</li><li><strong>Temperature:</strong> 20°C to 60°C</li><li><strong>Phase:</strong> Size Exclusion</li><li><strong>Particle Size: </strong>3 μm</li><li><strong>pH: </strong>2 to 8</li></ul>

Phenomenex Biozen dSEC-1 LC columns

Phenomenex Biozen dSEC-1 is a high-resolution SEC column for peptide therapeutics, delivering fast, reproducible aggregate analysis with improved peak shape and compatibility with SEC-MS and SEC-MALS.

<h4><strong>High-Resolution Aggregate Analysis for Peptide Therapeutics</strong></h4><p>Biozen dSEC-1 columns are engineered to meet the growing demand for aggregate analysis in peptide therapeutics and mid-sized biologics. Packed with 90 Å small pore silica and featuring inert diol-based surface chemistry, dSEC-1 delivers enhanced resolution for low and high molecular weight peptide aggregates. Its robust design ensures reproducibility and compatibility with advanced workflows like SEC-MS and SEC-MALS.</p><h5><strong>Robust Performance for Peptide Aggregate Analysis</strong></h5><ul><li>High resolution for low/high MW peptide aggregates (1–50 kDa)</li><li>Reproducible, and fast analysis with extended column lifetime</li><li>Improved peak asymmetry by up to 40%</li><li><strong>Recommended Use: </strong>Analysis of peptides, protein fragments, and small biologics with reduced analysis times and improved column lifetimes.</li></ul><h4><strong>Aggregate and Monomer Separation in Liraglutide Formulations</strong></h4><ul><li>Baseline resolution of monomer and two aggregates achieved in under 10 minutes</li><li>Exceptional reproducibility with retention time RSD ≤ 0.08% and peak area RSD ≤ 0.01%</li><li>Clear detection at low levels with S/N ratios of 13, 75, and 10,917 for aggregates and monomer</li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_separation_in_liraglutide_formulations_3_b0d97cd01f.jpg" alt="Phenomenex: Aggregate and Monomer Separation in Liraglutide Formulations" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_separation_in_liraglutide_formulations_3_b0d97cd01f.jpg 245w," sizes="100vw" width="938" height="307"></p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_separation_in_liraglutide_formulations_2_035bfea3bc.jpg" alt="Phenomenex: Aggregate and Monomer Separation in Liraglutide Formulations" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_separation_in_liraglutide_formulations_2_035bfea3bc.jpg 245w," sizes="100vw" width="1700" height="1050"></p><h3><strong>Biozen SEC Proprietary Silica Particle Technology</strong></h3><p>The Biozen dSEC columns are packed with low pore volume silica coupled with a proprietary hydrophilic diol-type bonded surface chemistry that prevents the silica surface from interacting with protein samples.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Biozen_SEC_Proprietary_Silica_Particle_Technology_502218b910.jpg" alt="Phenomenex: Biozen SEC Proprietary Silica Particle Technology" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Biozen_SEC_Proprietary_Silica_Particle_Technology_502218b910.jpg 245w," sizes="100vw" width="1448" height="469"></p><h4><strong>Improved Column Lifetime and Performance Stability</strong></h4><p>Phenomenex’s optimized SEC column loading technology has significantly improved the overall packing density and silica distribution of the columns leading to improved chromatographic lifetime and stability.</p><h4><strong>New Standard for Platform SEC Methods</strong></h4><p>Whether IgG2 or IgG4 isotypes, bispecifics, or Fc-Fusions, dSEC-2 provides excellent separation and sample recovery for many different classes of antibodies and related recombinant proteins.</p><h3><strong>Phenomenex Biozen Biologics LC Columns</strong></h3><p>With a new titanium <strong>BioTi™</strong> biocompatible <strong>hardware</strong> to minimize priming, <strong>four particle platforms</strong> for optimal versatility and <strong>nine particle chemistries</strong> to maximize selectivity and sensitivity, Biozen UHPLC/HPLC columns for <strong>protein analysis</strong> are seamlessly designed to bring peace of mind to your analysis of biologics through:</p><ul><li>Charge Variant Analysis</li><li>Aggregate Analysis</li><li>Peptide Mapping</li><li>Intact Mass Analysis</li><li>Intact and Subunit Analysis</li><li>Glycan Analysis</li><li>Peptide Quantitation</li><li>Drug Antibody Ratio (DAR)</li><li>Oligonucleotide Characterization</li></ul><h3><strong>Biocompatible Flow Path with BioTi™ Hardware</strong></h3><p>Keep your mind at ease knowing that we’ve minimized the need for priming with a new titanium infused biocompatible hardware and frit that doesn’t interfere with protein or peptide integrity!</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Bio_Ti_Hardware_991fb53395.jpg" alt="Phenomenex: BioTi Hardware" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Bio_Ti_Hardware_991fb53395.jpg 245w," sizes="100vw" width="1378" height="426"></p><h3><strong>4 Advanced Particle Platforms</strong></h3><p>All four of the Biozen particle platforms were individually designed and built by Phenomenex to take advantage of integral levels of performance, ruggedness, and reproducibility for protein characterization applications. Individually, each platform differs in the proprietary processing techniques used to control particle size and morphology.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Advanced_Particle_Platforms_a0959aca03.jpg" alt="Phenomenex: Advanced Particle Platforms" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Advanced_Particle_Platforms_a0959aca03.jpg 245w," sizes="100vw" width="1439" height="868"></p>

Products from category GPC/SEC HPLC columns - page 1

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