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Facts and Legends About Columns Packed with Sub-3-µm Core-Shell ParticlesDetailed study results challenge common beliefs about the mechanisms behind the excellent performance of core–shell particles.
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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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An Accurate Mass Database for the Analysis of Pesticides and Veterinary Drugs using Liquid Chromatography-High-Resolution Mass SpectrometryHere, the process to build an accurate mass database is thoroughly described and applications are commented on.
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Polar Vapor-Enhanced Separations with Planar Differential Mobility Spectrometry-Mass SpectrometryA brief historical overview of DMS, followed by a synopsis of the instrumentation, physics, and chemistry behind the separation principles
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Elevated Temperatures in Liquid Chromatography, Part I: Benefits and Practical ConsiderationsBenefits of elevated-temperature seperations in LC are discusssed.
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Mixed-Mode Chromatography—A ReviewMixed-mode high performance liquid chromatography (MM-HPLC) involves the combined use of two (or more) retention mechanisms in a single chromatographic system. Many original stationary phases have been proposed in recent years with promising possibilities, while applications have only started to appear in the literature. In this review, the authors discuss mixed-mode chromatography stationary phases. An overview of applications using mixed-mode chromatography is described, as well as the increased interest in mixed-mode systems for two-dimensional chromatography.
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Improving the Analytical Workflow for Protein Biopharmaceutical Characterization with a Novel LC–MS System SolutionThe ability to characterize protein therapeutics throughout the product development cycle is discussed.
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Speciation Analysis of Mercury in Sediments by HPLC Using HPLC Hyphenated to Vapour Generation Atomic Fluorescence Spectrometry Following Microwave-Assisted ExtractionA novel method for analysing mercury in sediment is described.
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Analysis of the Carotenoid Composition and Stability in Various Overripe Fruits by Comprehensive Two-Dimensional Liquid ChromatographyCarotenoids are a class of natural pigments, widely distributed in vegetables and fruits. A comprehensive two-dimensional liquid chromatography (LC×LC) method, based on the use of a cyano and an octodecylsilica column, placed in the first and second dimension, respectively, was applied to evaluate carotenoid composition and stability in selected overripe fruits representing the waste generated by a local food market. This research also evaluates if post-climacteric biochemical changes are linked to carotenoid degradation in the investigated fruits. A total of 22 compounds was separated into seven different chemical classes in the two-dimensional space, and identified by photodiode array (PDA) and mass spectrometry (MS) detection. The results prove that the waste generated by the large distribution of food still represent an important source of bioactives that could be used for other purposes.
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Going for Greener LC–MSA look at the role of micro-LC–MS to reduce the environmental impact of chromatography laboratories.
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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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Variable Selection and Reduction in Multivariate Calibration and ModellingIn multivariate calibration and modelling a model is built between a large data matrix containing many variables for each sample and the property of the sample.
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Speciation Analysis of Mercury in Sediments by HPLC Using HPLC Hyphenated to Vapour Generation Atomic Fluorescence Spectrometry Following Microwave-Assisted ExtractionA novel method for analysing mercury in sediment is described.
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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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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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Nontargeted Screening for the Verification of Allergenic Ingredients and Perfume Authenticity by GC-ecTOF-MSIn this study, the experimental nontargeted screening approach and corresponding data analysis workflows—simultaneously using molecular ion information and structural information—are presented for the molecular identification and authenticity verification process from a brand perfume using GC–ecTOF-MS.
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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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Next-Generation Stationary Phases: Properties and Performance of Core–Shell ColumnsThis short review focuses on the physicochemical properties of core–shell particles and their resulting chromatographic efficiencies as they relate to the comparison of their mass transfer kinetics to those of columns packed with sub-2-?m fully porous particles.
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Direct Insertion Probe – Mass Spectrometry in the Characterization of Opportunity CrudesDIP–MS is a fast and easy tool that can identify classes of compounds in opportunity crudes (heavy and ultraheavy crude oils, asphaltenes, and tar sands) in the field, without prior separation or treatment. It may enable fast screening of real samples to make a rough evaluation of the potential of reservoirs and oil fields.
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Polar Vapor-Enhanced Separations with Planar Differential Mobility Spectrometry-Mass SpectrometryA brief historical overview of DMS, followed by a synopsis of the instrumentation, physics, and chemistry behind the separation principles
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Ensuring the Safety of the Food Supply: Speeding Up Arsenic Speciation AnalysisSpeciation analysis of elemental contaminants in food and beverages has received a lot of attention in recent years. Recent regulations limit inorganic arsenic, taking into account that arsenic toxicity is dependent on the species present. Thus, the analysis procedure needs to be able to differentiate inorganic from organic arsenic forms. Liquid chromatography–inductively coupled plasma–mass spectrometry (LC–ICP-MS) is commonly used for the separation and detection of arsenic species, with the most widely used implementation based on ion exchange and characterized by relatively long run times. Testing of increasing sample numbers means that analysis speed becomes a focal point for potential improvements. We developed a method based on ion interaction chromatography, allowing a reduction in run times to
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Interactive Liquid Chromatography of Olefin-based ElastomersThe use of interactive liquid chromatography using porous graphite as a stationary phase and gradients of long chain alcohols and chlorinated aromatics to separate olefin-based elastomers according to their chemical composition is discussed.
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Asymmetrical Flow Field Flow Fractionation for Investigating Intermolecular Interactions of Multifunctional PolymersDescribes how asymmetrical flow field flow fractionation (AF4) can be used to characterize intermolecular interactions in multifunctional polymers used in drug delivery.
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Analyzing Aerosol Defence Pepper Spray Residues on Clothing and Analysis by GC-MSDescribes an analysis that was performed in a forensic science laboratory to assess who was the victim and who was the attacker in a legal dispute.
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It's All About SelectivityLearn how to use selectivity throughout the sample analysis cycle, from the sampling stage through data analysis and report generation.
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High-Throughput Screening of Abused Steroids in Urine Using Direct TOF-MS and LC–High-Resolution TOF-MS with Comprehensive Ion FragmentationA proof-of-concept application for detecting abused steroids in urine samples collected from an antidoping surveillance program
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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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Optimization of Sample Preparation for Pesticide Analysis in Oil-Based Cannabis Products Using LipiFiltr®This application note outlines the performance benefits achieved with UCT’s LipiFiltr® cleanup cartridge for the analysis of pesticides in oil-based cannabis products using LC–MS/MS analysis.
