Author
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Microwave-Accelerated Extraction — SW-846 Method 3546 and BeyondMicrowave-accelerated extraction (MAE) is described and evaluated. The latest enhancements to this technology are discussed from a hardware and applications perspective.
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Analysis of Barbiturates in Urine with Agilent 6430 LC–MS–MS and Poroshell 120 EC-C18Toxicology Laboratory at the Veterans Administration, Portland, Oregon, USA, Agilent Technologies
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High Throughput MicrochromatographyThe growing importance of biotherapeutics to the pharmaceutical industry has created an increasing demand for protein analysis techniques with high precision, high sensitivity and high throughput.
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Screening by LC–MS-MS and Fast Chromatography: An Alternative Approach to Traditional Immunoassays?A new technique was developed based on liquid chromatography coupled with tandem mass spectrometry to analyze drugs that are not part of current immunoassay screening, specifically zolpidem, zopiclone, and zaleplone, or "z-drugs."
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An Improved LC–MS–MS Method for the Determination of Clenbuterol in Human UrineA sensitive method that reduces the number of false-positive results
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Application note: Reversed-Phase Flash Chromatography Purification of Peptide-Peptoid HybridsPurification of peptide-peptoid hybrids can be obtained by reversed-phase chromatography with excellent recovery and resolution.
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Analysis of Pharmaceuticals and Personal Care Products in River Water Samples by UHPLC–TOF-MSA study of pharmaceuticals and personal care products in river water samples is presented from northeastern United States using ultrahigh-pressure liquid chromatography (UHPLC) coupled with TOF-MS for both targeted and nontargeted analytes
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50 Years in Chromatography and Sorption Techniques: A Look from the EastIn both East and West, new ideas have often met resistance.
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In Memory of Walton Caldwell, a Pioneer in SFCToday, I learned of the passing of a dear friend and a valued collaborator, Walton Caldwell, who founded the company Princeton Chromatography in 1994.
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Efficient PFAS Sample Prep, following EPA 1633Webinar Date/Time: Wed, May 29, 2024 11:00 AM EDT
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Control of Antibiotics by Micellar Liquid Chromatography in Food SamplesVeterinary drugs have become an integral part of livestock production and play an important role in animal welfare maintenance, mainly for preventing disease, curing infection, controlling the risk of disease transmission to humans and for increasing the productive capacity of animals.
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The Potential of Polymer Monolithic Capillary Columns for the LC–MS Analysis of Intact ProteinsDescribes the preparation of a reversed-phase monolithic column with an optimized porous structure to separate intact proteins using LC–MS.
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Cost-Effective Analysis of Major, Minor, and Trace Elements in Foodstuffs Using the 4100 MP-AESWhether the goal is food safety, ensuring quality or establishing provenance, measuring the trace element content of foods and beverages that we all consume is of paramount importance.
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Astaxanthin from Shrimp By-products for Active Packaging SystemsThe two year international project "Preparation of active packaging with antioxidant and antimicrobial activity based on astaxanthin and chitosan",1 which started in 2009, was funded by FONCYCIT (Fund for International Cooperation of Science and Technology between the European Union and Mexico).
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Toward Quantitative Imaging Mass SpectrometryThe main limitations of quantification using MALDI imaging are discussed and the different approaches used for quantitative measurement in MSI are evaluated.
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Identification of Novel Psychoactive Substances Using Hyphenated Mass Spectrometric TechniquesGas chromatography–mass spectrometry (GC–MS) and liquid chromatography–mass spectrometry (LC–MS) techniques offer advantages in separating and confirming the identity of constituents in novel psychoactive substances.
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Synthesis and Applications of BEH Particles in Liquid ChromatographyHow ethylene-bridged hybrid inorganic–organic (BEH) particles are prepared and how their special qualities can be used to improve separations
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Using MS Data for Peak Tracking in Computer Supported HPLC Method DevelopmentA systematic way to develop HPLC methods consists of building up and running a useful set of experiments (DOE, design of experiments) to evaluate the influence of several factors or method conditions on the selectivity of a chromatogram. The crucial part here is the peak tracking between the chromatograms.
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Toward Quantitative Imaging Mass SpectrometryThe main limitations of quantification using MALDI imaging are discussed and the different approaches used for quantitative measurement in MSI are evaluated.
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Retention Loss of Reversed-Phase Columns Using Highly Aqueous Mobile Phases: Fundamentals, Mechanism, and Practical SolutionsWe investigate a phenomenon observed by many practitioners of reversed- phase LC: a dramatic loss in retention volume or time after the column flow is stopped and resumed when using highly aqueous mobile phases with certain columns.
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Monitoring Water Framework Directive Priority Substances in WastewaterThe level of pollutants present in water bodies is most commonly judged against set environmental quality standards (EQSs) that vary among different countries.
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Lean, Green Food-Testing Machines: How Innovations in Microflow LC-MS Can Improve Food Safety Test MethodsThis article describes how a food testing laboratory can transition routine high performance liquid chromatography (HPLC) methods to microflow LC for improved sensitivity, throughput, and robustness of analysis.
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Screening of Pollutants in Water Samples and Extracts from Passive Samples and Extracts from Passive Samplers Using LC–MS and GC–MSThis article describes the GC–MS and LC–MS screening methods developed for the analysis of both low-volume water samples and extracts obtained from various designs of passive samplers.
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Identification of Novel Psychoactive Substances Using Hyphenated Mass Spectrometric TechniquesGas chromatography–mass spectrometry (GC–MS) and liquid chromatography–mass spectrometry (LC–MS) techniques offer advantages in separating and confirming the identity of constituents in novel psychoactive substances.
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Quantitative Analysis of Drugs of Abuse in Urine Using UHPLC Coupled to A TOF Mass SpectrometerHuman beings have long consumed mind altering drugs to attain a euphoric high. These illegal drugs are obtained directly from natural substances including plants or they are chemically synthesized. Monitoring consumption of abused drugs is important in workplace settings, crime scene investigations, forensic toxicology and other related areas.
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A Novel Approach to Measure Crop Plant Protein ExpressionCrop development to improve yield or disease resistance has been explored for centuries and the technologies to measure these improvements have subsequently become complex.
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Electromembrane Extraction with Vials of Conducting PolymerIn electromembrane extraction (EME), the target analyte is extracted from an aqueous sample across a supported liquid membrane (SLM) and analyzed using LC. Through the study presented here, we demonstrate the principles of the technique and test its performance.
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Use of Synthetic Peptides to Determine Relative Retention Times for Automated Targeted Protein/Peptide Quantification Method DevelopmentProtein/peptide discovery data obtained from data-dependent experiments have been used to increase the success rate of targeted quantification assays as well as automate method building.
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Field-Flow Fractionation Coupled with ICP-MS for the Analysis of Engineered Nanoparticles in Environmental SamplesThis article provides an overview of the capabilities of field-flow fractionation coupled with inductively coupled plasma–mass spectrometry and demonstrates that the technique shows a great deal of promise to separate, detect and quantitate nanoparticles in environmental matrices.
