A modified commercial gas chromatograph for the continuous monitoring of the thermal degradation of sunflower oil and off-line solid phase extraction gas-chromatography-mass spectrometry characterization of released volatiles

Journal of Chromatography. a
I OntañonJ Galbán

Abstract

A homemade flow cell attached to a commercial Gas Chromatograph equipped with a Flame Ionization Detector (FID) has been designed for the continuous monitoring of volatile compounds released during heating edible oils. Analytical parameters such as mass of sample, temperature and flow rates have been optimized and the obtained results have been compared with the corresponding thermographs from standard TG systems. Results show that under optimum conditions, the profiles of volatiles released upon heating are comparable to the profiles of TG curves, suggesting that the FID based system could be an alternative to TGA. Additionally, volatiles have been retained in a Lichrolut EN(®) resin, eluted and analyzed by Gas Chromatography-Mass Spectrometry. In this case, forty five compounds have been identified (acids, alcohols, alkanes, aldehydes, ketones and furans) and compared with the FID signals, working both in air or nitrogen atmosphere. It has been concluded that the oxidative thermal degradation is prevented in the presence of a nitrogen atmosphere.

References

Feb 5, 2004·Journal of Agricultural and Food Chemistry·Marleen van AardtSusan R Sims
Nov 13, 2007·Journal of Food Science·E Choe, D B Min
Jul 16, 2008·Journal of Agricultural and Food Chemistry·Lorelei A Mucci, Kathryn M Wilson
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Oct 14, 2011·Molecular Nutrition & Food Research·Kiflai Bein, George D Leikauf

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Citations

Apr 8, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Rita de Cássia de SouzaMarcelo Andrés Umsza-Guez

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