Volatile components of crude and refined-bleached-deodorized seal blubber oils were analyzed by direct thermal desorption-cryogenic trapping-gas chromatography olfactometry (DTD-GCO). Sample dilution analysis (SDA) was used in conjuction with DTD-GCO to indicate predominant odor-active compounds in the oils. A total of 27 odorants were detected consisting of 15 aldehydes, five ketones, two alcohols, and five unknown compounds. More (27) odorants were identified in the crude oil than in the refined oil (17). In general, odorants were present at higher odor-potency in the crude oil. Predominant odorants included (Z)-1,5-octadien-3-one (metallic), (E,E,Z)-2,4,7-decatrienal (fatty, fishy), (Z)-3-hexenal (green, cut-leaf), (E,Z)-2,6-nonadienal (cucumber), and an unknown (plastic, water bottle). DTD-GCO and SDA provided a simple, rapid, and sensitive approach for the study of the occurrence and removal of off-odors in seal blubber oils.
ASJC Scopus subject areas
- Chemical Engineering(all)