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

<div><div>Researchers led by <a target="_blank" rel="noopener noreferrer" href="https://kudova.group.uochb.cz/en">Eva Kudová</a> 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 Staphylococcus aureus.</div></div><div>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.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.These findings support the idea that rationally designed steroid-based molecules could act as antibiotic adjuvants, helping existing drugs overcome bacterial resistance.<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"><blockquote><h4>Original Article</h4><h4><a target="_blank" rel="noopener noreferrer" href="https://www.sciencedirect.com/science/article/pii/S0223523426001613?via%3Dihub">Steroidal hormones and neurosteroids - novel therapeutic strategies in bacterial infections: Design, synthesis, and biological evaluation</a></h4>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;Eur. J. Med. Chem., 2026, 308, 118716<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><h6>licensed under <a target="_blank" rel="noopener noreferrer" href="https://creativecommons.org/licenses/by/4.0/">CC-BY 4.0</a></h6></blockquote><h4>Abstract</h4>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 Staphylococcus aureus. Structure-activity relationship analysis identified compounds 13 and 16 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 13 significantly downregulated S. aureus 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.<h4>Instrumentation</h4><h5>Structural characterization</h5><ul><li>AVANCE III 400 MHz NMR spectrometer (Bruker)</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=3&amp;search=LTQ+Orbitrap+XL">LTQ Orbitrap XL HRMS</a> (Thermo Fisher Scientific, ESI)</li></ul></div>

Steroidal hormones and neurosteroids – novel therapeutic strategies in bacterial infections

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.<h4>New biomarkers for metformin use</h4>A team led by Tomáš Čajka from the Laboratory of Translational Metabolism at IPHYS analyzed plasma samples from 637 patients with type 2 diabetes treated with metformin and 143 non-diabetic controls using advanced metabolomics and lipidomics. Among 614 detected metabolites, they identified five from the group of N-lactoyl-amino acids (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.<h4>A sensitive “fingerprint” of the drug’s effect</h4>N-Lactoyl-amino acids are formed in cells by combining lactate and amino acids, thus reflecting the metformin-induced changes in cellular energy metabolism. “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,” emphasizes T. Čajka.<h4>Metabolomics in practice and international collaboration</h4>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 Clinical and Experimental Medicine in Prague and the West Coast Metabolomics Center (University of California, Davis) also participated in the study.The results demonstrate that advanced metabolomics approaches developed at IPHYS within the CarDia project can find highly practical applications both in clinical studies and in personalized monitoring of treatment in patients with diabetes.<blockquote><h4>The original article</h4><h4><a target="_blank" rel="noopener noreferrer" href="https://ascpt.onlinelibrary.wiley.com/doi/10.1002/cpt.70205">Untargeted Metabolomics Identifies N-Lactoyl-Amino Acids as Dose-Responsive Plasma Biomarkers of Metformin Adherence in Type 2 Diabetes</a></h4>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 HaluzikClin Pharmacol Ther, 119: 1057-1069<a target="_blank" rel="noopener noreferrer" href="https://doi.org/10.1002/cpt.70205">https://doi.org/10.1002/cpt.70205</a><h6>licensed under <a target="_blank" rel="noopener noreferrer" href="https://creativecommons.org/licenses/by/4.0/">CC-BY 4.0</a></h6></blockquote><h4>Abstract</h4>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.

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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Phenomenex Luna Omega Polar C18 HPLC Prep Columns

Luna Omega Polar C18 is a novel HPLC and UHPLC stationary phase capable of providing a unique selectivity within a wide elution window and increased retention for both polar and non polar analytes.

Reversed Phase Polar Retention Without the HeadacheLuna Omega Polar C18 is a novel HPLC and UHPLC stationary phase capable of providing a unique selectivity within a wide elution window and increased retention for both polar and non polar analytes. The all purpose C18 ligand provides hydrophobic interactions while a polar modified particle surface provides enhanced polar retention and also aqueous stability. These attributes make the Luna Omega Polar C18an excellent choice for balanced retention of polar and hydrophobic compounds as well as to solely enhance retention of highly polar compounds.<ul><li>Compatible with All Analytical HPLC/UHPLC Systems</li><li>Fully Scalable Particle Size UHPLC HPLC Preparative</li><li>100 % Aqueous Stable C18 Selectivity</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Luna_Omega_Polar_C18_HPLC_Column_a9c42ff59a.jpg" alt="Phenomenex: Luna Omega Polar C18 HPLC Column" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Luna_Omega_Polar_C18_HPLC_Column_a9c42ff59a.jpg 245w," sizes="100vw" width="870" height="315"><ul><li>Carbon Load: null %, 11.0 %</li><li>Particle Size: 1.6, 3, 5</li><li>Recommended Use: Polar retentive C18 phase for HPLC and UHPLC separations of hydrophobic/polar compounds</li></ul><h4>Not Just Another C18…Built Different</h4>Luna Omega Polar C18 is a uniquely modified C18 based chemistry that has been optimized to improve the performance of polar analyses. This new particle surface chemistry makes the Polar C18 applicable to all industries that utilize HPLC for mixtures of polar and non polar compounds.<h4>Stable Retention &amp; 100% Aqueous Stable&nbsp;</h4>Traditional C18 phases are known to collapse under 100 % aqueous conditions, causing retention loss of compounds and a method development headaches. That is why an advanced proprietary bonding technology was used for the Luna Omega Polar C18 in order to ensure aqueous stability.&nbsp;<h4>Increased Reversed Phase Polar Retention</h4>With its polar modified surface, the Luna Omega Polar C18 offers UHPLC users enhanced separation power that can greatly improve resolution values for target compounds.<blockquote>Stationary phase Luna Omega Polar C18 is provided in these column types: analytical, microbore, minibore, midbore and preparative</blockquote><h5>Luna Omega Polar C18 HPLC Axia™ Packed Preparative Columns are available with these parameters:</h5><ul><li>Column length (mm): 150, 250</li><li>Column ID (mm): 21.2; 30</li><li>Particle size (µm): 5</li></ul><h3>Phenomenex Luna Omega HPLC/UHPLC Columns</h3>The cutting edge thermally modified Luna Omega particle delivers high efficiency, ruggedness, reproducibility, and dependability for a wide range of chromatographic analyses. Luna Omega HPLC and UHPLC columns are built upon more then 20 years of applied knowledge, invention, and customer experience in the manufacture and packing of LC columns. The particle’s novel design and proprietary manufacturing process results in greater particle inertness, a stronger particle morphology, and more consistent porosity.<ul><li>Greater separation muscle and retention</li><li>Consistent porous structure and elimination of micropores</li><li>Extreme ruggedness and reproducibility</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Thermal_modified_pore_structure_of_Luna_Omega_Column_particles_37138bb135.jpg" alt="Phenomenex:Thermal modified pore structure of Luna Omega Column particles" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Thermal_modified_pore_structure_of_Luna_Omega_Column_particles_37138bb135.jpg 245w," sizes="100vw" width="1257" height="369"><h3>Explore Luna Omega Columns</h3><h5>Astounding Performance</h5>The undeniably high efficiency levels found in each Luna Omega UHPLC column provide you with the potential of huge gains in method performance. While traditional silica and hybrid fully porous particles claim high performance, when compared to Luna Omega 1.6 μm, they drastically fall short and prevent UHPLC scientists from reaching their UHPLC potential.<h5>Separation Muscle</h5>Our industry leading bonding technologies in conjunction with high efficiency levels ensure excellent stationary phase coverage and improved separation power. Now, with Luna Omega 1.6 μm, you can turn difficult separations into resolution achievements.<h5>Inert Foundation</h5>Luna Omega UHPLC columns contain a unique silica modified using a proprietary, post-synthetic thermal treatment process to provide extraordinary mechanical strength and significantly greater inertness than traditional fully porous and hybrid materials. This greatly minimizes secondary interactions that negatively affect peak shape, allowing for greater method accuracy.<h5>Consistent Results</h5>Batch-to-batch and column-to-column, Luna® Omega media and columns are designed to be consistent and incredibly accurate tools for your analysis. Each batch and column are quality tested to ensure dependability and reproducibility.

Phenomenex Lux Cellulose-1 Chiral HPLC Columns

Phenomenex Lux Cellulose-1 chiral HPLC column offers reliable enantiomer separation, matching or exceeding CHIRALCEL® OD® performance across multiple modes.

This universally trusted cellulose phenyl carbamate derivative is absolutely essential to any chiral screen. Lux Cellulose-1 is a guaranteed alternative to CHIRALCEL® OD® and OD-HX. Expect equivalent or better performance when using this Lux phase.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Lux_Cellulose_1_Chiral_HPLC_Columns_f70a9f21a0.jpg" alt="Phenomenex: Lux Cellulose-1" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Lux_Cellulose_1_Chiral_HPLC_Columns_f70a9f21a0.jpg 245w," sizes="100vw" width="500" height="150"><ul><li>Separation Mode: Chiral</li><li>Phase Composition: Regenerated Cellulose (RC)</li><li>Recommended Use: Separation of enantiomers and racemic mixtures by reversed phase, normal phase, polar organic and SFC with a fully porous particle, coated with a polysaccharide stationary phase.</li><li>Stationary phase: Cellulose tris(3,5-dimethylphenylcarbamate)</li></ul><h4>Achieve Greater Chiral Separation Success</h4>Lux Cellulose-1 columns are guaranteed to perform as well or better than the equivalent CHIRALCEL® OD® and OD-H® Chiral Technologies column. Lux phases can also provide alternative selectivity to other chiral selectors for the most challenging chiral separations. Lux columns offer a wide and complementary range of enantioselectivity for even the most difficult chiral separation projects.The helical structure of the cellulose creates a complex steric environment that provides stronger interactions and better chiral recognition abilities. Additionally, the selector’s constituents produce hydrogen bonding, dipole, and π-π interactions that all affect the CSPs ability to separate your enantiomers effectively.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Lux_Performance_Advantage_f239557883.jpg" alt="Phenomenex: Lux Performance Advantage" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Lux_Performance_Advantage_f239557883.jpg 182w," sizes="100vw" width="677" height="580">

Phenomenex Lux Cellulose-2 Chiral HPLC Columns

Phenomenex Lux Cellulose-2 chiral HPLC column, a halogenated cellulose phase, ensures superior enantiomer separation and is a proven alternative to CHIRALCEL® OZ®.

This first to market halogenated cellulose phenyl carbamate derivative offers unique chiral recognition abilities that complement the rest of the Lux family of columns.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomene_Lux_Cellulose_2_Chiral_HPLC_Columns_4aa21cccda.jpg" alt="Phenomenex: Lux Cellulose-2 Chiral HPLC Columns" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomene_Lux_Cellulose_2_Chiral_HPLC_Columns_4aa21cccda.jpg 245w," sizes="100vw" width="768" height="438"><ul><li>Separation Mode: Chiral</li><li>Stationary phase: Regenerated Cellulose (RC)<ul><li>Cellulose tris(3-chloro-4-methylphenylcarbamate)</li></ul></li><li>Recommended Use: Separation of enantiomers and racemic mixtures by reversed phase, normal phase, polar organic and SFC with a fully porous particle, coated with a polysaccharide stationary phase.</li></ul><h4>Achieve Greater Chiral Separation Success</h4>Lux Cellulose-2 columns are guaranteed to perform as well or better than the equivalent CHIRALCEL-OZ and OZ-H® Chiral Technologies column. Lux phases can also provide alternative selectivity to other chiral selectors for the most challenging chiral separations.Lux columns offer a wide and complementary range of enantioselectivity for even the most difficult chiral separation projects. The helical structure of the cellulose creates a complex steric environment that provides stronger interactions and better chiral recognition abilities. Additionally, the selector’s constituents produce hydrogen bonding, dipole, and π-π interactions that all affect the CSPs ability to separate your enantiomers effectively.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Lux_Performance_Advantage_cellulose_2_bbd747a32c.jpg" alt="Phenomenex: Lux Performance Advantage" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Lux_Performance_Advantage_cellulose_2_bbd747a32c.jpg 179w," sizes="100vw" width="677" height="590">

Phenomenex Lux Cellulose-3 Chiral HPLC Columns

Phenomenex Lux Cellulose-3 chiral HPLC column provides reliable enantiomer separation, performing as well or better than CHIRALCEL® OJ® with unique chiral selectivity.

This first to market halogenated cellulose phenyl carbamate derivative offers unique chiral recognition abilities that complement the rest of the Lux family of columns.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Lux_Cellulose_3_Chiral_HPLC_Columns_2_74f7d52275.jpg" alt="Phenomenex: Lux Cellulose-3 Chiral HPLC Columns" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Lux_Cellulose_3_Chiral_HPLC_Columns_2_74f7d52275.jpg 216w," sizes="100vw" width="903" height="650"><ul><li>Separation Mode: Chiral</li><li>Stationary phase: Regenerated Cellulose (RC)<ul><li>Cellulose tris(4-methylbenzoate)</li></ul></li><li>Recommended Use: Separation of enantiomers and racemic mixtures by reversed phase, normal phase, polar organic and SFC with a fully porous particle, coated with a polysaccharide stationary phase.</li></ul><h4>Achieve Greater Chiral Separation Success</h4>Lux Cellulose-3 columns are guaranteed to perform as well or better than the equivalent CHIRALCEL® OJ® and OJ-H® Chiral Technologies column. Lux phases can also provide alternative selectivity to other chiral selectors for the most challenging chiral separations. Lux columns offer a wide and complementary range of enantioselectivity for even the most difficult chiral separation projects.The helical structure of the cellulose creates a complex steric environment that provides stronger interactions and better chiral recognition abilities. Additionally, the selector’s constituents produce hydrogen bonding, dipole, and π π interactions that all affect the CSPs ability to separate your enantiomers effectively.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Lux_Performance_Advantage_cellulose_3_a232dc359a.jpg" alt="Phenomenex: Lux Cellulose-3 Performance Advantage" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Lux_Performance_Advantage_cellulose_3_a232dc359a.jpg 179w," sizes="100vw" width="677" height="590">

Phenomenex Lux i-Cellulose-5 Chiral HPLC Columns

Phenomenex Lux i-Cellulose-5 chiral HPLC column delivers broad enantioselectivity, strong solvent compatibility, and scalable performance for LC and SFC separations.

<h4>Your New First Choice Chiral Column!</h4>The immobilization and bonding technology used within the Lux i-Cellulose-5 promotes column stability in strong organic solvents, which affords you the ability to expand your chiral separation success with more solvent systems and separation modes.<ul><li>Wide Solvent Flexibility</li><li>Broad Enantioselectivity</li><li>Strong Solvent Compatibility</li><li>Recommended Use: Separation of enantiomers and racemic mixtures by reversed phase, normal phase, polar organic and SFC with a fully porous particle, immobilized with a polysaccharide stationary phase. This Immobilization provides additional strong organic solvent ruggedness so that DCM, DMSO and other related strong solvents can be used on column.</li></ul><h4>Achieve Greater Chiral Separation Success</h4>Lux® i-Cellulose-5 contains achemical crosslinking between the polysaccharide and silica supports which inturn provides incredible strong solvent (THF, DCM, DMSO, MtBE, Ethyl Acetate, etc.) robustness compared to coated phases and prevents the phase from being dissolved in strong solvents.Lower pressure, all purpose particle size for analytical LC (HPLC) or SFC methods and especially for high performance preparative LC or SFC puriﬁcation work.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Lux_i_Cellulose_5_Chiral_HPLC_Columns_28bc99dbb1.jpg" alt="Phenomenex: Lux i-Cellulose-5 Chiral HPLC Columns" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Lux_i_Cellulose_5_Chiral_HPLC_Columns_28bc99dbb1.jpg 245w," sizes="100vw" width="1541" height="595"><h4>Dependability and Seamless Scalability</h4>Our highest standards of quality will ensure that you are fully satisfied with each and every Lux chiral column as consistent quantitation and results come with every Lux batch and column that we manufacture. With matching selectivity, the 3 μm and 5 μm i-Cellulose-5 particle sizes allow you to scale down to increase resolution or easily scale up for preparative purification work.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Incredible_consistency_batch_to_batch_and_between_particle_sizes_4a8adc47b8.jpg" alt="Phenomenex: Incredible consistency batch-to-batch and between particle sizes" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Incredible_consistency_batch_to_batch_and_between_particle_sizes_4a8adc47b8.jpg 103w," sizes="100vw" width="677" height="1025">

Phenomenex Lux Amylose-1 Chiral HPLC Columns

Phenomenex Lux Amylose-1 chiral HPLC column ensures reliable enantiomer separation, matching or exceeding CHIRALPAK® AD® with strong recognition and broad selectivity.

This universally trusted amylose phenylcarbamate derivative is absolutely essential to any chiral screen. Lux Amylose-1 is a guaranteed alternative to CHIRALPAK® AD®. Expect equivalent or better performance when using this Lux phase.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Lux_Amylose_1_Chiral_HPLC_Columns_a5e2773084.jpg" alt="Phenomenex: Lux Amylose-1 Chiral HPLC Columns" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Lux_Amylose_1_Chiral_HPLC_Columns_a5e2773084.jpg 245w," sizes="100vw" width="1236" height="626"><ul><li>Stationary phase: Amylose tris(3,5-dimethylphenylcarbamate)</li><li>Recommended Use: Separation of enantiomers and racemic mixtures by reversed phase, normal phase, polar organic and SFC with a fully porous particle, coated with a polysaccharide stationary phase.</li></ul><h4>Achieve Greater Chiral Separation Success</h4>Lux columns are guaranteed to perform as well or better than the equivalent DAICEL® Chiral Technologies column. Lux phases can also provide alternative selectivity to other chiral selectors for the most challenging chiral separations. Lux columns offer a wide and complementary range of enantioselectivity for even the most difficult chiral separation projects.The helical structure of the amylose creates a complex steric environment that provides stronger interactions and better chiral recognition abilities. Additionally, the selector’s constituents produce hydrogen bonding, dipole, and π π interactions that all affect the CSPs ability to separate your enantiomers effectively.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Lux_Amylose_1_separation_c517f7e910.jpg" alt="Phenomenex: Separation comparison - Lux Amylose-1 vs. CHIRALPAK AD-H" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Lux_Amylose_1_separation_c517f7e910.jpg 179w," sizes="100vw" width="677" height="590">

Phenomenex Lux i-Amylose-3 Chiral HPLC Columns

Phenomenex Lux i-Amylose-3 chiral HPLC column offers broad enantioselectivity, strong solvent stability, and proven performance as an alternative to CHIRALPAK® IG®.

<h4>Your New First Choice Chiral Column!</h4>The immobilization and bonding technology used within the Lux i-Amylose-3 promotes column stability in strong organic solvents, which affords you the ability to expand your chiral separation success with more solvent systems and separation modes.<ul><li>Wide Solvent Flexibility</li><li>Broad Enantioselectivity</li><li>Strong Solvent Compatibility</li><li>Recommended Use: Separation of enantiomers and racemic mixtures with strong stability in strong organic solvents</li></ul><h4>Achieve Greater Chiral Separation Success</h4>The Lux i-Amylose-3, like the rest of the Lux product line, is an incredibly versatile phase that has been manufactured and developed to give you your desired results again and again. This is especially true under harsh conditions where coated phases are unable to perform.Lower pressure, all purpose particle size for analytical LC (HPLC) or SFC methods and especially for high performance preparative LC or SFC puriﬁcation work.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Lux_i_Cellulose_5_Chiral_HPLC_Columns_28bc99dbb1.jpg" alt="Phenomenex: Lux i-Amylose-3 Chiral HPLC Column" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Lux_i_Cellulose_5_Chiral_HPLC_Columns_28bc99dbb1.jpg 245w," sizes="100vw" width="1541" height="595"><h4>Guaranteed Alternative to CHIRALPAK® IG®</h4><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Guaranteed_Alternative_to_CHIRALPAK_IG_584996e87b.jpg" alt="Phenomenex: Guaranteed Alternative to CHIRALPAK® IG®" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Guaranteed_Alternative_to_CHIRALPAK_IG_584996e87b.jpg 176w," sizes="100vw" width="677" height="600">

Phenomenex Strata X-AW Solid Phase Extraction (SPE)

Strata-X-AW mixed-mode SPE sorbent enables strong retention of acids (pKa ≤5) with 100% organic wash, ensuring maximum removal of interferences for clean, reliable extractions.

Weak Anion Mixed-Mode Solid Phase Extraction (SPE)A weak anion-exchange functionalized polymeric sorbent that allows for complete retention of acidic compounds with a pKa less than 5, making 100% organic wash conditions possible. A 100% organic wash ensures that the maximum amount of interferences are removed from the target compound.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_AW_SPE_cd5908db4d.jpg" alt="Phenomenex: Strata-X-AW SPE" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_AW_SPE_cd5908db4d.jpg 245w," sizes="100vw" width="500" height="268"><ul><li>Recommended Use: Extraction of acidic compounds, particularly strong acids</li></ul><h4>Starting Method</h4><h5>For Acids with pKa ≤ 5</h5><ul><li>Column: 1 mL Methanol</li><li>Equilibrate: 1 mL Water, pH 6-7</li><li>Load: Diluted Sample pH 6-7</li><li>Wash 1: 1 mL 25 mM Ammonium Acetate Buffered, pH 6-7</li><li>Wash 2: 1 mL Methanol</li><li>Elute Any Acid: 2x 500 µL 5 % NH4OH in Methanol</li><li>Elute Weak Acids: 2x 500 µL 5 % Formic Acid in Methanol</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_single_tube_435d45d0ad.jpg" alt="Phenomenex: Strata X single tube" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_single_tube_435d45d0ad.jpg 156w," sizes="100vw" width="1080" height="1080">Based on 30 mg/1 mL sorbent mass. The above is a convenient starting point for SPE method development, further optimization may be required to tailor the method for your specific extraction needs.<h4>Available Formats</h4><ul><li>96-Well-Plate</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_96_well_plate_9a66005814.jpg" alt="Phenomenex: Strata X 96-well plate" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_96_well_plate_9a66005814.jpg 156w," sizes="100vw" width="1080" height="1080"><ul><li>1, 3, and 6mL Tubes</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_tubes_1_9b04cab6c1.jpg" alt="Phenomenex: Strata X 1, 3, and 6mL Tubes" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_tubes_1_9b04cab6c1.jpg 156w," sizes="100vw" width="1080" height="1080"><ul><li>Giga Tubes (12-150mL Tubes)</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_tubes_2_a8cd1706ec.jpg" alt="Phenomenex: Strata X Giga Tubes (12-150mL Tubes)" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_tubes_2_a8cd1706ec.jpg 156w," sizes="100vw" width="1080" height="1080">

Phenomenex Strata X-A Solid Phase Extraction (SPE)

Strata-X-A strong anion-exchange SPE retains weak acids (pKa >2) with 100% organic wash, maximizing interference removal. Available in tubes, plates, and giga formats.

Strong Anion Mixed-Mode Solid Phase Extraction (SPE)A strong anion-exchange functionalized polymeric sorbent that allows for complete retention of weakly acidic compounds with a pKa greater than 2, making 100% organic wash conditions possible. A 100% organic wash ensures that the maximum amount of interferences are removed from the target compound.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_A_SPE_e107f0b6bf.jpg" alt="Phenomenex: Strata-X-A SPE" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_A_SPE_e107f0b6bf.jpg 245w," sizes="100vw" width="500" height="268"><ul><li>Recommended Use: Extraction of weakly acidic compounds</li></ul><h4>Starting Method</h4><h5>For Acids with pKa &gt; 2</h5><ul><li>Column: 1 mL Methanol</li><li>Equilibrate: 1 mL Water, pH 6-7</li><li>Load: Diluted Sample pH 6-7</li><li>Wash 1: 1 mL 25 mM Ammonium Acetate Buffered, pH 6-7</li><li>Wash 2: 1 mL Methanol (collect this fraction to analyze Neutral/Bases)</li><li>Elute Acid: 2x 500 µL 5 % Formic Acid in Methanol</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_single_tube_435d45d0ad.jpg" alt="Phenomenex: Strata X single tube" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_single_tube_435d45d0ad.jpg 156w," sizes="100vw" width="1080" height="1080">Based on 30 mg/1 mL sorbent mass. The above is a convenient starting point for SPE method development, further optimization may be required to tailor the method for your specific extraction needs.<h4>Available Formats</h4><ul><li>96-Well-Plate</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_96_well_plate_9a66005814.jpg" alt="Phenomenex: Strata X 96-well plate" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_96_well_plate_9a66005814.jpg 156w," sizes="100vw" width="1080" height="1080"><ul><li>1, 3, and 6mL Tubes</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_tubes_1_9b04cab6c1.jpg" alt="Phenomenex: Strata X 1, 3, and 6mL Tubes" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_tubes_1_9b04cab6c1.jpg 156w," sizes="100vw" width="1080" height="1080"><ul><li>Giga Tubes (12-150mL Tubes)</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_tubes_2_a8cd1706ec.jpg" alt="Phenomenex: Strata X Giga Tubes (12-150mL Tubes)" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_tubes_2_a8cd1706ec.jpg 156w," sizes="100vw" width="1080" height="1080">

Phenomenex Strata X-C Solid Phase Extraction (SPE)

Strata-X-C strong cation-exchange SPE retains basic compounds (pKa ≤10.5) with 100% organic wash for maximum cleanup. Offered in tubes, plates, and giga formats.

Strong Cation Mixed-Mode Solid Phase Extraction (SPE)A strong cation-exchange functionalized polymeric sorbent that allows for complete retention of basic compounds with a pKa less than 10.5, making 100% organic wash conditions possible. A 100% organic wash ensures that the maximum amount of interferences are removed from the target compound.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_C_SPE_4927d7340d.jpg" alt="Phenomenex: Strata-X-C SPE" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_C_SPE_4927d7340d.jpg 245w," sizes="100vw" width="500" height="268"><ul><li>Recommended Use: Extraction of weakly basic compounds</li></ul><h4>Starting Method</h4><h5>For Bases with pKa ≤ 10.5</h5><ul><li>Column: 1 mL Methanol</li><li>Equilibrate: 1 mL Acidified Water</li><li>Load: Diluted Acidified Sample</li><li>Wash 1: 1 mL 0.1 N HCI in Water (collect this fraction to analyze Polar Neutrals)</li><li>Wash 2: 1 mL 0.1 N HCI in Methanol (collect this fraction to analyze Neutrals/Acids)</li><li>Elute Bases: 2x 500 µL 5 % NH4OH in Methanol</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_single_tube_435d45d0ad.jpg" alt="Phenomenex: Strata X single tube" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_single_tube_435d45d0ad.jpg 156w," sizes="100vw" width="1080" height="1080">Based on 30 mg/1 mL sorbent mass. The above is a convenient starting point for SPE method development, further optimization may be required to tailor the method for your specific extraction needs.<h4>Available Formats</h4><ul><li>96-Well-Plate</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_96_well_plate_9a66005814.jpg" alt="Phenomenex: Strata X 96-well plate" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_96_well_plate_9a66005814.jpg 156w," sizes="100vw" width="1080" height="1080"><ul><li>1, 3, and 6mL Tubes</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_tubes_1_9b04cab6c1.jpg" alt="Phenomenex: Strata X 1, 3, and 6mL Tubes" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_tubes_1_9b04cab6c1.jpg 156w," sizes="100vw" width="1080" height="1080"><ul><li>Giga Tubes (12-150mL Tubes)</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Phenomenex_Strata_X_tubes_2_a8cd1706ec.jpg" alt="Phenomenex: Strata X Giga Tubes (12-150mL Tubes)" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Phenomenex_Strata_X_tubes_2_a8cd1706ec.jpg 156w," sizes="100vw" width="1080" height="1080">

Products from Phenomenex - page 3

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