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Loss of Volatile Lipid Oxidation Products during Thermal Desorption in Dynamic Headspace‐Capillary Gas Chromatography
Author(s) -
PARK PETER S. W.
Publication year - 1993
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1993.tb03249.x
Subject(s) - tenax , thermal desorption , chemistry , gas chromatography , desorption , hydrogen , adsorption , chromatography , lipid oxidation , gas chromatography–mass spectrometry , helium , mass spectrometry , analytical chemistry (journal) , organic chemistry , antioxidant
Unsaturated aldehydes from lipid oxidation, t‐2‐hexenal, t‐2‐heptenal, t, t‐2,4‐heptadienal and t,t‐2,4‐decadienal were investigated for structural alteration during dynamic headspace (DHS)‐gas chromatographic (GC) analysis. After thermal desorption during which the GC carrier gas, hydrogen, flowed through Tenax TA adsorbent trap, both 2‐alkenals and 2,4‐alkadienals produced partially and fully hydrogenated compounds as artifacts. The loss due to hydrogenation was most severe with 2,4‐decadienal, its recovery being 31.2%. Hydrogenated artifacts were not observed after thermal desorption with helium as the GC carrier gas. It is recommended that helium instead of hydrogen be used as the carrier gas in conducting DHS‐GC analysis of unsaturated lipid oxidation compounds.