Professor Michaela Rumlová, head of a research group of the National Institute of Virology and Bacteriology at UCT Prague (and Vice-Rector for doctoral studies), holder of a licensed patent &nbsp;for antiretroviral testing assays, and recipient of the Czech Science Foundation’s President’s Award for HIV research, has also become the principal investigator of the bilateral INTER-EXCELLENCE II project “Cellular factors regulating the export and packaging of unspliced ​​retroviral RNA”, starting this year. In this interview, she explains how retroviruses such as HIV “hack” the cell in order to export their own genome from the nucleus into the cytoplasm, and then to the site where it is specifically packaged into nascent viral particles, a key step in viral replication. Her team is collaborating with the NIH (National Institutes of Health) and Rockefeller University to elucidate mechanisms that may help reveal new vulnerable points in the retrovirus replication cycle while simultaneously clarifying related cellular processes.<h5>Could you describe your project and its main objectives?</h5>Retroviruses, such as HIV, are viruses that carry genetic information in the form of RNA; however, after entering a cell, they are able to reverse transcribe it into DNA and integrate it into the host genome. In order to replicate, they must transport their genetic information—in the form of unspliced RNA—from the nucleus into the cytosol. There, it serves both as a template for the production of viral proteins and as the genome of new viral particles. This is highly unusual, as the cell very carefully controls which RNA molecules are allowed to leave the nucleus. Normal protein-coding cellular RNAs, known as messenger RNAs (mRNAs), must undergo splicing—a processing step in which certain segments are removed—before being exported. When this process fails, mRNA that retains these segments is held back in the nucleus as part of quality control and subsequently degraded. Retroviruses have managed to outwit this cellular control machinery, allowing their unspliced RNA to pass into the cytoplasm.Our project focuses on identifying the cellular proteins that assist retroviruses in this step and on the mechanism by which protein complexes bound to viral RNA are remodelled during RNA transport. The goal is to understand how the virus uses cellular mechanisms to its advantage and how this pathway is linked to the subsequent fate of the RNA, i.e. to its translation and packaging into new viral particles.<h5>Why is this export of unspliced ​​RNA so important for retroviral replication?</h5>Because this RNA has a dual role for the virus. On the one hand, it serves as a template for synthesizing viral proteins in the cytoplasm; on the other, it represents the genetic material itself, which must be packaged into new viral particles. The virus must package its RNA genome in its unspliced form, as only this RNA contains essential sequences without which further viral replication would be impossible.Simply put: the virus needs to get a complete copy of its genetic instructions out of the nucleus. Once the viral RNA is in the cytoplasm, it can be used as a template for synthesizing viral proteins; and a portion of these RNA molecules is then selected and packaged into a new particle as a genome. We are interested in how the virus forces the cell to allow viral RNA that is, from the cell’s perspective, “unfinished,” that is unspliced, to leave the nucleus. We are also investigating how the cell and the virus together - albeit unintentionally from the cell’s perspective - determine which RNA molecule will be translated into proteins and which will be packaged as the genome. This is one of the key, yet still not fully understood, steps of retroviral replication.<h5>What do you think it was about your project that impressed the Ministry of Education, Youth and Sports’ jury the most?</h5>I believe the decisive factor was a combination of several elements. First, the reviewers were primarily interested in the scientific problem itself. We are investigating a mechanism that is essential for retroviruses, but still not sufficiently understood, which may also have broader implications for the regulation of cellular processes. In addition, the quality of the team, our strong collaboration with the NIH and Rockefeller University, and the use of modern methods that will allow us to track viral RNA in great detail also played a role. It was also important that the project has clear objectives and a realistic plan.<h5>How will this research contribute to the development of new treatments for retroviral infections?</h5>It is important to say that this is primarily basic research. Rather than developing a new drug directly, we are trying to understand, at the molecular level, the step that the virus cannot do without. Only when we fully understand the mechanism of these cellular processes and identify the essential factors for the export of unspliced ​​RNA and how they function, will we be able to better determine which interactions or mechanisms represent potentially vulnerable points. Similar mechanisms associated with the export of unspliced ​​mRNA also appear in some diseases, such as cancer, so I &nbsp;see the benefit of our research mainly in that it will refine our understanding of these pathological processes in the cell, and retroviruses help us do so. Therefore, our work on retroviruses not only shows us how the virus works, but also how the cell itself works.<h5>What responsibilities does your UCT Prague team have? How does the collaboration with your American partners work?</h5>At UCT Prague, we are conducting the project’s primary experimental work. Our research involves cell cultures, viral models, and various biochemical techniques ranging from immunochemistry to microscopy that allow us to track viral RNA and identify its cellular partners. In collaboration with colleagues from NIH, Frederick, we are developing single-particle tracking methods to observe viral RNA movement in living cells across both space and time. Furthermore, we are working with colleagues from Rockefeller University to employ iCLIP methods for the precise mapping of protein-binding sites on RNA. Both collaborations are valuable to us, because they are not just about data sharing, but also about the transfer of expertise and detailed know-how.<h5>Who else is collaborating on the project?</h5>At UCT Prague, we collaborate closely with the Department of Biotechnology and the Department of Biochemistry and Microbiology. Externally, we work with colleagues from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague) and the Central European Institute of Technology in Brno (CEITEC). Our research naturally necessitates the integration of diverse fields of expertise; it requires combining virology, cell biology, and biochemistry with advanced imaging and modern approaches to study RNA-protein interactions. This is exactly what makes our project capable of addressing complex questions that a single laboratory cannot tackle on its own.<h5>Are there plans to continue the project? Have you brought on new collaborators, and are you looking to welcome new colleagues to the team?</h5>Yes, definitely. In basic research, it often happens that one answered question opens up several more. High-quality, properly interpreted data provide a foundation you can build on — and that is what moves scientists forward. It is already clear that the topic of retroviral RNA export and packaging has broader implications and may reveal more general principles of how RNA functions within the cell. We also hope the project will be attractive to students, as it connects classical molecular biology, biochemistry, and virology with cutting-edge biotechnological methods. Students are already involved in the project as part of their bachelor’s and master’s theses.<h5>What was the personal turning point that motivated you to pursue a long-term investigation into retroviral particles?</h5>I first encountered retroviruses in the early 1990s during my diploma thesis, when I was working at IOCB Prague on HIV-1 protease inhibitors. At that time, AIDS could not yet be effectively treated, and retrovirus research had a completely different dimension. From the very beginning, I was fascinated by how such a relatively small and simple virus can outsmart evolutionarily highly optimized cellular processes and turn them to its own advantage. And that has never stopped fascinating me. From a scientific point of view, retroviruses are remarkable; just consider one of their enzymes, reverse transcriptase, without which no diagnostic or research laboratory in the world could function today. Without it, it would be impossible to diagnose RNA viruses like SARS-CoV-2, influenza, or HIV using RT-PCR tests, or, for example to produce recombinant human proteins in bacterial cells.

Tracking unspliced RNA: Professor Rumlová studies how retroviruses “hack” cells

High-performance liquid chromatography (HPLC) remains one of the most widely used analytical techniques for separating, identifying, and quantifying compounds in complex mixtures. Successful HPLC method development depends not only on selecting the correct column and optimizing the mobile phase composition, but also on choosing the appropriate detector. Even a perfectly optimized chromatographic separation provides little value if the detection system cannot properly capture and interpret the analytes of interest.In many ways, the detector acts as the “vision system” of the chromatograph. It converts separated compounds into measurable electronic signals, allowing analysts to identify components and determine their concentrations. The choice of detector therefore has a major impact on sensitivity, selectivity, robustness, and the overall quality of analytical data.This article provides an overview of the most common HPLC detection techniques, discusses their strengths and limitations, and outlines the most important criteria to consider when selecting a detector for a specific analytical task.<h3>HPLC Detection Technologies</h3>HPLC detectors are typically divided into two major categories:<ol><li>Specific detectors (solute-property detectors)</li><li>Bulk property detectors</li></ol>Specific detectors respond to a particular chemical or physical property of the analyte. Ideally, their signal is largely unaffected by changes in mobile phase composition. Common examples include UV/Vis detectors, fluorescence detectors, and mass spectrometers.Bulk property detectors, on the other hand, measure differences between the pure mobile phase and the mobile phase containing analytes. These detectors are considered more universal because they respond to properties shared by many compounds. Refractive index detectors are among the best-known examples, alongside conductivity and light-scattering detectors.Both detector categories have important advantages depending on the application, sample type, and analytical goals.<h3>Common Detector Types Used in HPLC</h3>A wide variety of detectors are available for HPLC systems, ranging from highly universal devices to extremely selective and sensitive technologies.Common detector options include:<ul><li>UV/Vis detectors</li><li>Diode array detectors (DAD/PDA)</li><li>Fluorescence detectors</li><li>Refractive index detectors (RID)</li><li>Conductivity detectors</li><li>Evaporative light scattering detectors (ELSD)</li><li>Charged aerosol detectors (CAD)</li><li>Mass spectrometry detectors (MS)</li></ul>Each technology offers a different balance of sensitivity, selectivity, robustness, operational complexity, and cost.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Detector_overview_with_characteristics_Graphic_by_KNAUER_84b0dd30b1.jpg" alt="KNAUER: Detector overview with characteristics. Graphic by KNAUER." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Detector_overview_with_characteristics_Graphic_by_KNAUER_84b0dd30b1.jpg 245w," sizes="100vw" width="1293" height="596"><h3>Selecting the Right HPLC Detector</h3>There is no universally ideal detector for all HPLC applications. The best choice depends on several factors, including analyte chemistry, matrix complexity, required detection limits, and instrument compatibility.Careful detector selection is essential for obtaining reliable and meaningful analytical results.The following considerations can help guide the selection process.<h4>1. Chemical and Physical Properties of the Analytes</h4>The chemical nature of the compounds being analyzed is one of the most important selection criteria.Questions to consider include:<ul><li>Do the analytes contain chromophores?</li><li>Are the compounds naturally fluorescent?</li><li>What is their polarity?</li><li>What is their molecular weight?</li><li>Are they volatile or non-volatile?</li></ul>Compounds containing UV-active groups are often well suited for UV/Vis detection, while fluorescent molecules can benefit from the high sensitivity of fluorescence detectors. Non-UV-active compounds may require universal detection approaches such as CAD, ELSD, or mass spectrometry.<h4>2. Required Sensitivity</h4>Detector sensitivity determines the minimum concentration that can be reliably detected and quantified.Routine quality control analyses often rely on UV/Vis detectors because they provide sufficient sensitivity for many applications while remaining relatively simple and cost-effective. However, trace-level analysis or highly complex matrices may require more advanced technologies such as:<ul><li>Fluorescence detection</li><li>Charged aerosol detection</li><li>Mass spectrometry</li></ul>These techniques offer significantly lower detection limits and greater analytical specificity.<h4>3. Detector Linearity</h4>Linearity describes how well detector response correlates with analyte concentration across a defined range.A detector with strong linearity ensures accurate quantification and simplifies calibration procedures. Poor linearity can introduce quantification errors, especially when analyzing samples across broad concentration ranges.<h4>4. Dynamic Range</h4>Dynamic range refers to the concentration interval over which the detector can reliably measure analytes.Applications involving samples with highly variable concentrations require detectors capable of maintaining accurate response over a broad range. A wide dynamic range reduces the need for repeated dilutions or multiple analytical runs.<h4>5. Selectivity</h4>Selectivity defines the detector’s ability to distinguish target analytes from other matrix components.This factor becomes particularly important for complex samples containing many interfering substances. Highly selective detectors reduce the risk of overlapping signals and false positives.Mass spectrometry is often advantageous when dealing with unknown compounds or highly complicated sample matrices because it provides structural information in addition to quantitative data.<h4>6. Budget Considerations</h4>Detector cost is another practical factor that laboratories must evaluate.UV/Vis and refractive index detectors are generally among the more economical choices, making them attractive for routine analyses and standard applications.More sophisticated technologies such as fluorescence detection, CAD, or mass spectrometry typically require:<ul><li>Higher initial investment</li><li>Additional maintenance</li><li>More complex infrastructure</li><li>Greater operational expertise</li></ul>However, the overall value of the detector should always be considered in relation to analytical performance requirements and long-term application needs.<h4>7. Instrument and Mobile Phase Compatibility</h4>The selected detector must be compatible with the operational conditions of the HPLC system.Important parameters include:<ul><li>Flow rate range</li><li>Pressure limitations</li><li>Mobile phase composition</li><li>Solvent compatibility</li></ul>Some detectors are highly sensitive to mobile phase composition or gradient changes, while others tolerate a broader range of operating conditions.Ensuring proper compatibility helps prevent baseline instability, signal interference, and reduced detector performance.<h4>8. Destructive vs. Non-Destructive Detection</h4>Another important consideration is whether the analytical workflow involves only detection or also preparative purification.Non-destructive detectors allow collected fractions to remain intact after detection, which is highly beneficial for preparative chromatography and purification workflows.Destructive detectors, by contrast, consume or alter the sample during measurement and are therefore more suitable for analytical applications where sample recovery is not required.<h4>9. Reliability and Ease of Operation</h4>Practical usability is often just as important as analytical performance.Some detectors are designed for straightforward plug-and-play operation, while others require:<ul><li>Frequent calibration</li><li>Specialized maintenance</li><li>Dedicated gas supplies</li><li>Vacuum systems</li><li>Advanced operator expertise</li></ul>Laboratories should evaluate the available technical support, user experience, and maintenance capabilities before implementing more sophisticated detection technologies.Reliable operation and manageable maintenance requirements can significantly improve laboratory productivity and reduce downtime.Choosing the correct HPLC detector starts with understanding both the sample and the analytical objective. Rather than selecting a detector simply because it is available, laboratories should ensure that the technology aligns with the chemistry of the analytes, required performance characteristics, and workflow demands.In many cases, combining multiple detectors within a single HPLC system can provide even greater analytical insight by delivering complementary information from the same chromatographic separation.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/KNAUER_Flow_scheme_for_detector_selection_Graphic_by_KNAUER_486004045f.jpg" alt="KNAUER: Flow scheme for detector selection. Graphic by KNAUER." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_KNAUER_Flow_scheme_for_detector_selection_Graphic_by_KNAUER_486004045f.jpg 245w," sizes="100vw" width="1316" height="808">Interested in learning more? Future articles will explore individual HPLC detection techniques in greater detail, including their operating principles, application areas, and practical advantages for different analytical workflows.

A comprehensive guide for selecting the appropriate HPLC detector

News from LabRulezLCMS Library - Week 20, 2026

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The University of Chemistry and Technology, Prague is a natural centre of first-rate study and research in the area of chemistry in Czechia and is one of the country's largest educational and research institutions focused on technical chemistry, chemical and biochemical technologies, material and chemical engineering, food chemistry, and environmental studies.

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Based in Berlin, KNAUER is a medium-sized, owner-managed company that has been serving the sciences since 1962. We develop and manufacture scientific instruments of superior quality for liquid chromatography, including: Analytical HPLC/UHPLC, Preparative HPLC, Fast protein liquid chromatography (FPLC), Multi-column chromatography/Simulated moving bed (SMB) chromatography. High pressure dosing, in-line detection systems, and osmometry are additional business areas.

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Identification of the substance – what is in your sample? (Bioanalytic)

We are able to identify metabolites and products of chemical reactions, contaminants of biological and chemical substances and preparations, and perform profiling of a series of samples to study the kinetics of transformations.

<h4>Substance Identification - Looking for answers to what's in your sample? - we can help you.</h4>Substance identification based on LC-MS/MS techniques can involve single compounds or mixtures of substances. In our analyses, we rely primarily on the knowledge and skills we have acquired after many years of work. For analysis, we use full laboratory facilities for sample preparation and high-resolution mass spectrometry (<a target="_blank" rel="noopener noreferrer" href="https://labexperts.com.pl/o-nas/">equipment</a>).We use different work algorithms depending on the material we are dealing with and the analytical task to be solved. We use DDA (IDA) or DIA (SWATH) methods or targeted approaches (e.g. MRMhr) if we know what to expect. Thus, we are able to identify metabolites and products of chemical reactions, contaminants of biological and chemical substances and preparations, and perform profiling of a series of samples to study the kinetics of transformations.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Bioanalytic_Bioanalytic_Identification_of_the_substance_what_is_in_your_sample_2_0f425a648b.jpg" alt="Bioanalytic: Identification of the substance – what is in your sample" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Bioanalytic_Bioanalytic_Identification_of_the_substance_what_is_in_your_sample_2_0f425a648b.jpg 245w," sizes="100vw" width="1881" height="1156"><h4>COST OF SERVICE</h4>We determine the cost of the service individually. The final cost is influenced by many factors related to the nature of the sample itself and the client's expectations. Thus, the price depends, among other things, on the complexity of the sample preparation procedure, the scope and number of analyses, etc.The service includes (depending on individual arrangements):<h5>Development of sample preparation procedure</h5><ul><li>Depending on the matrix and test substances.</li></ul><h5>Development of analytical methods</h5><ul><li>Application of high-resolution LC-MS/MS analyses using DDA (IDA) or DIA (SWATH) experiments and software to support the development of targeted screening methods.</li></ul><h5>Analysis of results includes:</h5><ul><li>finding and identifying the substances of interest, interpreting MS/MS spectra and proposing a structural formula.</li><li>Comparative analysis of sample series, e.g. PCA,</li><li>profiling of analytes in sample series</li></ul><h5>Reporting of results</h5><ul><li>Compile results into easy-to-read reports.</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Bioanalytic_Bioanalytic_Identification_of_the_substance_what_is_in_your_sample_3_c1b8adc1d0.jpg" alt="Bioanalytic: Identification of the substance – what is in your sample" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Bioanalytic_Bioanalytic_Identification_of_the_substance_what_is_in_your_sample_3_c1b8adc1d0.jpg 245w," sizes="100vw" width="1919" height="1208">

Analysis of Anabolic steroids (Bioanalytic)

We offer a highly specific and sensitive qualitative analysis of a wide profile of anabolics by LC-HR-MS/MS technique (detection limits range from 0.01 to 5 ng/ml, depending on the substance).

<h4>Anabolic substances in urine</h4>The effect of anabolic steroids (<a target="_blank" rel="noopener noreferrer" href="https://en.wikipedia.org/wiki/Anabolic_steroid">more information</a>) is to stimulate the growth of muscle mass and sometimes also bone mass by stimulating protein synthesis or altering calcium metabolism. This effect is often used in sports doping. However, anabolic steroids also have many side effects, as they strongly affect the body's overall hormonal balance.Anabolic steroids used by purely recreational athletes are still not banned in most countries, including Poland. Nevertheless, their amateur use during adolescence often results in the inability to continue a professional sports career into adulthood or leads to hormonal imbalances in the body.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Bioanalytic_Analysis_of_Anabolic_steroids_Bioanalytic_1_46fa2f41ca.jpg" alt="Bioanalytic: Analysis of Anabolic steroids." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Bioanalytic_Analysis_of_Anabolic_steroids_Bioanalytic_1_46fa2f41ca.jpg 245w," sizes="100vw" width="1200" height="740">If you want to know whether and which anabolic substances are present in the samples of athletes, or you want to exclude doping in this area - use the offer carried out by us together with the company <a target="_blank" rel="noopener noreferrer" href="http://www.lab4tox.pl/">Lab4Tox</a>. We offer a highly specific and sensitive qualitative analysis of a wide profile of anabolics by LC-HR-MS/MS technique (detection limits range from 0.01 to 5 ng/ml, depending on the substance). The use of high-resolution mass spectrometry (HR-MS and HR-MS/MS) in the analysis of anabolic steroids makes it possible to unequivocally confirm or exclude the presence of a given compound. The list of compounds at present includes:<ul><li>Boldenone undecylenate</li><li>Turinabol</li><li>Drostanolone enanthate</li><li>Drostanolone propionate</li><li>Methandienone</li><li>Methenolone acetate</li><li>Methenolone enanthate</li><li>Nandrolone phenylpropionate</li><li>Oxandrolone</li><li>Oxymetholone</li><li>Stanozolol</li><li>5-alpha-DHT</li><li>6-beta-hydroxymethandienone</li><li>19-norandrosterone</li><li>3'-hydroxystanazolol</li><li>4-beta-hydrozystanazolol</li><li>17-alpha-trenbolone</li><li>Testosterone caproate</li><li>Testosterone cypionate</li><li>Testosterone decanoate</li><li>Testosterone enanthate</li><li>Testosterone isocaproate</li><li>Testosterone phenylpropionate</li><li>Testosterone propionate</li><li>Testosterone undecanoate</li><li>Trenbolone acetate</li><li>Testosterone</li><li>Epitestosterone</li></ul>The list of compounds is not complete and will be systematically expanded according to customer needs.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Bioanalytic_Analysis_of_Anabolic_steroids_Bioanalytic_2_78729119b0.jpg" alt="Bioanalytic: Analysis of Anabolic steroids is carried out by us together with the company Lab4Tox." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Bioanalytic_Analysis_of_Anabolic_steroids_Bioanalytic_2_78729119b0.jpg 245w," sizes="100vw" width="625" height="100"><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products?category=54&amp;distributorItems=315">Other analytical methods we offer</a>.

Analysis of Synthetic Peptide Hormones (Bioanalytic)

We offer highly specific and sensitive quantitative analysis of peptides by LC-MS/MS technique (LOQ < 1 ng/ml).

<h4>Synthetic peptide hormones - a study of the purity of formulations and composition of dietary supplements.</h4>In sports doping, small synthetic peptide hormones represent an increasingly attractive class of supplements for improving physical performance in amateur and professional athletes. Their use, depending on the type of peptide, is aimed primarily at building muscle tissue while intensifying fat reduction processes combined with the induction of the body's regenerative processes.Do you want to be sure that the peptide you are using is in the product in the amount declared by the manufacturer? Or do you have doubts that the supplement you are using is contaminated with these compounds? If you are troubled by these or similar questions - feel free to contact us. We perform tests in cooperation with <a target="_blank" rel="noopener noreferrer" href="http://www.lab4tox.pl">Lab4Tox</a>. We offer highly specific and sensitive quantitative analysis of peptides by LC-MS/MS technique (LOQ &lt; 1 ng/ml). At the moment, we analyze the following peptides:<ul><li>GHRP-2</li><li>GHRP-6</li><li>BPC-157</li><li>Melanotan-2</li></ul>The list of compounds is not complete and will be systematically expanded according to customer needs.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Bioanalytic_Analysis_of_Anabolic_steroids_Bioanalytic_2_78729119b0.jpg" alt="Bioanalytic: Analysis of Synthetic Peptide Hormones. We perform tests in cooperation withLab4Tox." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Bioanalytic_Analysis_of_Anabolic_steroids_Bioanalytic_2_78729119b0.jpg 245w," sizes="100vw" width="625" height="100"><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products?category=54&amp;distributorItems=315">Other analytical methods we offer</a>.

Wiley LC-MSⁿ Library of Drugs, Poisons and Their Metabolites, 2nd Edition

The Maurer/Wissenbach/Weber LC-MSⁿ Library, 2nd Ed., offers MS² and MS³ spectra for over 2,270 drugs and 3,600+ metabolites. It enables proven metabolite-based LC-MSⁿ screening and is one of the few libraries focused on metabolite spectra.

<h4>Optimize LC-MSⁿ Screening with a Proven Metabolite-Based Library</h4>The Maurer/Wissenbach/Weber LC-MSⁿ Library, 2nd Edition, offers a powerful screening method using MS² and MS³ spectra for over 2,270 parent drugs and 3,600+ metabolites. It’s one of the few libraries focused specifically on metabolite spectra, improving sensitivity, selectivity, and reducing false negatives in LC-MS analysis.Developed for clinical and forensic applications, the library helps confirm compound identity and detect metabolites even when parent analytes are suppressed. It also reduces false positives through characteristic metabolite patterns.Includes instrument-specific training materials on sample prep, chromatography, and MS settings.<h5>Library Specs:</h5><ul><li>Spectra: &gt;13,000</li><li>Structures: 10,787</li><li>Compounds: &gt;2,270</li><li>Metabolites/Artifacts: &gt;3,600</li><li>Endogenous Molecules: 90</li></ul>Search compound coverage at <a target="_blank" rel="noopener noreferrer" href="https://spectrabase.com/">compoundsearch.com</a>.

Wiley Registry of Tandem Mass Spectral Data – MSforID

The "Wiley Registry of Tandem Mass Spectral Data: MS for ID" consists of 12,048 positive and negative mode spectra of over 1,000 compounds of interest for forensics, toxicology, and pathology. 

<h4>High Mass-Accuracy LC-MS/MS Library for Confident Identification</h4>The Wiley Registry of Tandem Mass Spectral Data: MS for ID includes 12,048 spectra in positive and negative modes covering 1,163 compounds relevant to forensics, toxicology, and pathology—including drugs, pesticides, and pharmaceuticals.Developed by the Oberacher team at Innsbruck Medical University under controlled conditions, the library offers ~95% specificity and &gt;92% sensitivity. It delivers fast, reproducible results and is highly transferable across LC-MS/MS platforms.Highlights:<ul><li>12,048 spectra for 1,000+ small bioorganic molecules</li><li>Optimized for high-accuracy identification</li><li>Includes advanced LC-MS/MS search algorithm</li><li>Compatible with most instrument formats</li></ul>Search compound coverage at: <a target="_blank" rel="noopener noreferrer" href="https://www.compoundsearch.com">www.compoundsearch.com</a>

Wiley LC-HR-MS/MS Library of Drugs, Poisons and Their Metabolites

The updated MMHW LC-HR-MS/MS library offers 5,500+ spectra of drugs, poisons, and metabolites. A trusted resource for toxicology, doping control, and environmental analysis.

<h4>From the Leader in Spectral Data</h4>The Maurer, Meyer, Helfer, Weber: LC-HR-MS/MS Library of Drugs, Poisons, and Their Metabolites, 2nd Edition (MMHW) is one of the most comprehensive LC-MS resources for clinical and forensic toxicologists. Developed by Prof. Hans H. Maurer and his team, the database emphasizes metabolites essential for accurate toxicological screening.This edition contains over 5,500 high-quality spectra, covering 2,300+ parent drugs/poisons and 3,200+ metabolites or artifacts across 100+ classification groups. Substances are categorized by toxicological relevance, with accompanying methods in PDF format.The data is carefully curated and reviewed by experts, ensuring reliable compound identification. Wiley collaborates with major MS vendors, supporting multiple instruments and formats for seamless workflow integration.<h4>Applications</h4>The MMHW library is trusted worldwide for compound analysis and verification in:<ul><li>Clinical and forensic toxicology</li><li>Doping control</li><li>Environmental and food chemistry</li><li>Pharmacokinetics and pathology</li></ul><h4>What’s New</h4>The 2nd edition adds 550+ new datasets, including designer drugs, cannabinoids, opioids, stimulants, and more.<h4>Specifications</h4><ul><li>Spectra: 5,558</li><li>Structures: 4,270</li><li>Unique Compounds: 2,763</li><li>Metabolites/Artifacts: &gt;3,250</li></ul>Available in KnowItAll and NIST formats, this library remains a critical resource for accurate, sensitive, and selective LC-HR-MS/MS screening.Search compound coverage at <a target="_blank" rel="noopener noreferrer" href="https://spectrabase.com/">compoundsearch.com</a>.

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Tracking unspliced RNA: Professor Rumlová studies how retroviruses “hack” cells

News from LabRulezLCMS Library - Week 20, 2026

A comprehensive guide for selecting the appropriate HPLC detector