Analysis of Polychlorinated Biphenyls and Polybrominated Biphenyl Ethers in Rice and Their Risk Assessment

Abstract

The risk of polychlorinated biphenyls (PCBs) and polybrominated biphenyl ethers (PBDEs) in 45 rice samples was assessed. The rice samples were collected and ground, and all ground samples were treated according to the direct extraction-acidic silica purification pretreatment method. The analysis of 7 indicator of PCBs and 12 representative of PBDEs was performed with gas chromatography-tandem mass spectrometric method. In these 45 rice samples, PCBs was detectable in 42% samples and the total amount was between 0~78 pg/g dw. The main congeners of PCBs in rice were PCB-28 and PCB-52, which was accordance with the production profile of PCBs in China. PBDEs were detected only in one of the 45 samples with a concentration of 41 pg/g dry weight. The concentrations of PCBs and PBDEs in rice was low and they had no risk to human health as well.

Keywords

• polychlorinated biphenyl
• polybrominated biphenyl ether
• rice
• risk assessment