title: Contamination levels of PCDDs, PCDFs and CoPCbs in fish oils used as raw materials for margarine and shortening and retailed fish.
abstract: Toxic equivalent (TEQ) levels of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/DFs) and coplanar polychlorinated biphenyls (CoPCBs) were analyzed in both crude (n = 5) and refined-hardening fish oils (n = 2), which are used in part as the raw materials of margarine and shortening, and in some retailed fish (n = 6), which may be similar to those used as sources of fish oil. PCDDs/DFs-TEQ levels ranged from 0.1 to 13.5 pg TEQ/g fat weight in crude fish oils, from 0.5 to 1.6 pg TEQ/g fat weight in refined-hardening fish oils, and ranged from 1.4 to 31.2 pg TEQ/g fat weight in retailed fish. The ranges of PCDDs/DFs-TEQ in crude fish oils, in refined-hardening fish oils and in retailed fish overlapped each other. In addition, CoPCBs-TEQ levels ranged from 4.9 to 19.6 pg TEQ/g fat weight in crude fish oils, from 0.2 to 1.4 pg TEQ/g fat weight in refined-hardening fish oils, and from 2.7 to 165.8 pg TEQ/g fat weight in retailed fish. TEQ levels of CoPCBs in refined-hardening fish oils were much lower than those in crude fish oils and in retailed fish. This was due to the lower concentrations of less-chlorinated congeners in refined-hardening fish oils, as compared to those in crude fish oils and retailed fish. It appears that less-chlorinated PCBs congeners in refined-hardening fish oils are partly removed during the refining process.
authors.affiliation: Department of Food and Health Science, Osaka City Institute of Public Health and Environmental Science, 8-34, Tohjo-cho, Tennoji-ku, Osaka 543-0026, Japan.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Nakatani
authors.forename: Kazuomi
authors.initials: K
authors.lastname: Itano
authors.forename: Tadao
authors.initials: T
authors.lastname: Fujita
mesh_terms: D001572:Benzofurans / Q000032:analysis* / Q000302:isolation & purification; D000072338:Dibenzofurans, Polychlorinated; D004041:Dietary Fats / Q000032:analysis; D004785:Environmental Pollutants / Q000032:analysis* / Q000302:isolation & purification; D005395:Fish Oils / Q000032:analysis*; D005396:Fish Products / Q000032:analysis*; D005504:Food Analysis; D005506:Food Contamination / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D008383:Margarine / Q000032:analysis*; D011078:Polychlorinated Biphenyls / Q000032:analysis* / Q000302:isolation & purification; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis / Q000302:isolation & purification
chemical_list: D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D004041:Dietary Fats; D004785:Environmental Pollutants; D005395:Fish Oils; D000072317:Polychlorinated Dibenzodioxins; D008383:Margarine; D011078:Polychlorinated Biphenyls