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Flavour and fragrance profiles typically comprise contributions from a wide range of volatile organic compounds (VOCs) and those at the lowest concentration can have the most profound effect on perceived aroma. Historically, this has made it difficult to carry out meaningful odour profilin...
GC, MDGC, GC-MS
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The value of gas chromatography with vapor phase infrared spectrophotometric detection is described for a series of isomeric phenethylamines. The major mass spectral fragments for these unique isomers occur at equivalent mass and members of each series have equal molecular weights. The inf...
GC, MDGC, GC-MS
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The determination of the fatty acid composition of lipids is an analysis that is widely performed. Typically a manual procedure is used to prepare the lipid sample for analysis, by forming fatty acid methyl esters from the triglycerides, prior to analysis by gas chromatography of the resul...
GC, MDGC, GC-MS
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The present research is focused on the use of a comprehensive 2D GC methodology, in the analysis of a Brazilian essential oil, viz., Macacaporanga leaf oil. A rapid scanning quadrupole mass spectrometer (qMS), employed as detection system and operated at a 20 Hz scanning frequency, supplie...
GC, MDGC, GC-MS
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On July 1st, 2008 the requirements to the United States Pharmacopeia (USP) general chapter <467> for the identification and control of residual solvents became official. Although the USP and FDA have held many educational events to help companies understand the scope of these new standards...
GC, MDGC, GC-MS
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There are still obstacles to switch from the very common internal diameters of 0.32 mm or 0.25 mm to the "faster" columns with 0.15 mm ID. This article will show how easy it is to adapt your methods and to what you have to pay attention to when doing the conversion.
Introduction
The most...
GC, MDGC, GC-MS