Congener-specific distribution of polychlorinated dibenzo-p-dioxins, dibenzofurans and biphenyls in animal feed.
Polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs) and polychlorinated biphenyls (PCBs) were extracted by accelerated solvent extraction from animal feed samples and analysed by high-resolution gas chromatography/high-resolution mass spectrometry (HRGC/HRMS). In all of the feed samples analysed, the concentrations of PCDD/Fs and PCBs were below the existing tolerance limit of 5 pg I-TEQ g(-1) and 200 ng g(-1) fat, respectively. The mean concentrations of the total PCDDs, total PCDFs and total PCBs were 1.73-11.50 pg g(-1), 0.23-11.91 pg g(-1) and 60.00-234.40 pg g(-1) feed, respectively. Investigation of the correlations among the concentrations of PCDDs, PCDFs and PCBs showed that samples containing increased amounts of PCDFs also contained higher concentrations of PCDDs, with an average ratio of PCDF:PCDD of about 1.23:1 (r(2)=0.72, p<0.05). The correlation between the concentrations of PCDD/Fs and PCBs was positive but not significant.
Kim
Byung-Hoon
BH
School of Environmental Science and Engineering, Pohang University of Science and Technology, Korea.
Jeong
Jin-Suk
JS
Chang
Yoon-Seok
YS
D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D001572:Benzofurans / Q000032:analysis*; D001713:Biphenyl Compounds / Q000032:analysis*; D002417:Cattle; D004147:Dioxins / Q000032:analysis*; D005506:Food Contamination; D005659:Fungicides, Industrial / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D007723:Korea; D011200:Poultry; D013552:Swine
D001572:Benzofurans; D001713:Biphenyl Compounds; D004147:Dioxins; D005659:Fungicides, Industrial; C010574:biphenyl; C023614:dibenzofuran; C020887:dibenzo(1,4)dioxin