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A Rapid and Sensitive SPE-UPLC-MS-MS Method for Determination of Ropinirole in Human Plasma
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Erin E. Chambers and Diane M. Diehl, Waters Corporation
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Utility of UPLC-MS-MS and SPE for High Throughput Quantitative Bioanalysis
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Erin E. Chambers and Diane M. Diehl, Waters Corporation
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Accelerated Solvent Extraction: Sample Preparation for Determination of Brominated Flame Retardants
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Peterson, J. H., Carlson, R. E., Murphy, B.J., and Richter, B. E., Dionex Corporation
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Overcoming Compound Volatility with Sub-ambient ELSD
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The success of evaporative light scattering detection relies on evaporating the eluent without destroying the analyte particle. Where the analyte is non-volatile, evaporator temperatures of 50-100 °C can be used without compound degradation, thus giving maximum sensitivity. However, when compounds have high vapor pressures and the eluent has a high boiling point (e.g. water), detection of semi-volatile compounds is problematic, because the evaporation temperature needs to be set at 30 °C or above in order to evaporate the solvent.
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In-House Generation of Hydrogen for Gas Chromatography
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Hydrogen, commonly used as a carrier gas instead of Helium for gas chromatography (GC) can be supplied via cylinders or by the electrolysis of water using an inhouse generator containing metallic electrodes or an ionomeric membrane. An in-house generator can provide a significant increase in safety and convenience with a reduction in operating costs.
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An Acetonitrile Free Chromatographic Methodology for Melamine Detection and Quantitation Using SFC
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The global economic downturn, particularly the collapse of the automotive and associated industries, has caused an overall reduction in the demand for acrylonitrile.
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GC-MS Screening for Melamine Adulteration in Baby Formula and Dairy Products
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Melamine is an industrial chemical with a high nitrogen content that can cause kidney stones and lead to renal failure.
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Validated LC-FAIMS-MS Peptide Quantitation Method
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Featured application note
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SPE and HILIC HPLC Strategy for Determination of Melamine
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featured application note
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