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Automated Multi-Cartridge Solid-Phase Extraction of Phosphorus Containing Pesticides in Drinking Water
Philip Bassignani, FMS,Inc.
Analytically, OPPs can pose some challenges due to the wide diversity of physical structures and behavioural characteristics of individual analytes. This often results in individual extraction protocols being implemented for labs to meet regulatory compliances. With the FMS, Inc TurboTrace® ABN Multi Cartridge SPE system, and its ability to incorporate dual cartridge extractions, it is possible to pair analytes with dissimilar characteristics into a single, fully automated extraction process. Read More |
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Quantitative Determination of Serum 25-OH-vitamin D3/D2
Michal Svoboda, Andrea Kiehne, Birgit Schneider, Markus Meyer, Bruker Daltonics
Liquid chromatography tandem mass spectrometry (LC–MS–MS) offers clinical researchers a rapid and cost-effective way to quantitatively determine the levels of 25-OH-vitamin D3/D2 metabolites in serum over extended concentration ranges. Furthermore, unlike immunoassays, this technique is able to simultaneously determine the individual concentrations of the 25-OH D3 and 25-OH D2 metabolites. Here, we report a novel approach using ion trap mass spectrometry for the rapid and accurate quantification of these metabolites in serum. Read More |
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Major Improvement in Throughput and Resolution of Xanthones in Mangosteen Pericarp
Qi Zhang, Bruce Bailey, Marc Plante, and Ian Acworth, Thermo Fisher Scientific
Recently mangosteen has been proposed as a homeopathic therapy in the treatment of Parkinson’s disease. Such therapeutic benefits have been mostly attributed to a unique family of compounds referred to as xanthones that are most abundant in the pericarp of the fruit. The chromatographic analysis of the xanthones and other potentially important analytes contained in this supplement presents a huge challenge. This application describes an improved method achieved on the Vanquish platform that provides enhanced throughput with better resolution and peak capacity. Read More |
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Absolute Molar Mass in UHPLC via the µDAWN and UT-rEX
Sophia Kenrick and Aym Berges, Wyatt Technology Corporation
Ultra-high performance liquid chromatography (UHPLC) enables fast, efficient separation of biomolec-ular samples. Compared to standard SEC, UHP-SEC provides improved resolution, higher throughput, less solvent and smaller sample consumption for analysis of precious biological samples. Read More |
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