LCGC Europe-09-01-2017

LCGC Europe

Liquid Chromatography–Atmospheric Pressure Photo Ionization-Mass Spectrometry Analysis of the Nonvolatile Precursors of Rancid Smell in Mayonnaise

September 01, 2017

Features

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9

Monitoring lipid oxidation during the shelf life of lipid-containing food emulsions, such as mayonnaise, is challenging. It is, however, essential for the development of improved, consumer-preferred products. Determining the nonvolatile lipid oxidation products (NONVOLLOPS), the precursor compounds for rancidity, is required to determine the effectiveness of product stabilization technologies. A method based on normal-phase liquid chromatography with atmospheric pressure photo ionization-mass spectrometry (LC–APPI-MS) was developed for this purpose. The inclusion of a size-exclusion chromatography (SEC) step was needed to remove interfering diacylglycerides and free fatty acids from the samples. The combined SEC and normal-phase LC–APPI-MS method allowed the identification of a wide range of oxidized species including hydroperoxides, oxo-2½ glycerides, epoxides, and other oxidized species. The method was found to be more suitable for the analysis of large sample sets. The relative levels of NONVOLLOPS from bo

Highlights from HPLC 2017 Symposium

September 01, 2017

Column Watch

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The 45th International Symposium on High Perfomance Liquid Phase Separations and Related Techniques (HPLC 2017), cochaired by Michal Holc€apek and František Foret, was held 18–22 June in Prague, Czech Republic. This instalment covers some of the highlights observed at the symposium, including advances in large-molecule separations, multidimensional chromatography, and areas of growing application of high performance liquid chromatography (HPLC). In addition, trends and perspectives on future developments in HPLC noted from the conference are presented.

Monitoring Medical Cannabis

September 01, 2017

Features

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Giuseppe Cannazza and Cinzia Citti from the University of Modena and Reggio Emilia discuss the growing interest in the use of medicinal cannabis in Europe and the analytical challenges involved.

Vol 30 No 9 LCGC Europe September 2017 Regular Issue PDF

September 01, 2017

Issue PDF

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Click the title above to open the LCGC Europe September 2017 regular issue, Vol 30, No 9, in an interactive PDF format.