The lipid portion of dried squids (Todarodes pacificus) was extracted, and its hydrocarbons and 2-alkylcyclobutanones were separated using a florisil column. Both compounds were identified by gas chromatography and mass spectrometry and used to investigate the production of radiation-induced hydrocarbons and 2-alkylcyclobutanones. Concentrations of the hydro-carbons and 2-alkylcyclobutanones increased linearly with the radiation dosage. The major hydrocarbons in the irradiated dried squids were pentadecane and 1-tetradecene, which originated from palmitic acid. The amount of pentadecane was the highest among the radiation-induced hydrocarbons in the dried squids. The major 2-alkylcyclobutanone in the irradiated dried squids was 2-dodecylcyclobutanone, which was formed from the large amount of palmitic acid. 2-Tetradecylcyclobutanone, which may be produced from stearic acid in sample lipids, was also detected. Radiation-induced hydrocarbons and 2-alkylcyclobutanones were detected at ≥0.5 kGy. These compounds were not detected in dried squids that were not irradiated. Radiation-induced hydrocarbons can be used as a detection marker for irradiated dried squids; however, the amount of 2-alkylcyclobutanones produced was not enough to be used as a marker. Radiolytic products of lipids, such as hydrocarbons or 2-alkylcyclobutanones, can be used to monitor food safety for consumers, ensuring proper irradiation labeling in foods and quarantine treatment in international trade.
Analysis of Radiolytic Products of Lipid in Irradiated Dried Squids (Todarodes pacificus)
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JUN-HYOUNG KIM, HYE-YOUNG SEO, KYONG-SU KIM; Analysis of Radiolytic Products of Lipid in Irradiated Dried Squids (Todarodes pacificus). J Food Prot 1 August 2004; 67 (8): 1731–1735. doi: https://doi.org/10.4315/0362-028X-67.8.1731
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