Food intake is one of the main pathways of human exposure to chlorinated paraffins （CPs). This study assessed the dietary exposure for the general Chinese population to short-chain chlorinated paraffin (SCCPs) and medium-chain chlorinated paraffins (MCCPs) through meat and aquatic products. Twenty pooled samples of meat and meat products from 20 provinces and eighteen pooled aquatic products from 18 provinces of China were collected in 2011. As the sampling sites covered about two-thirds of the Chinese population, the meat and aquatic samples were considered to be representative of the true characteristics of CPs contamination in Chinese meat and aquatic products. The concentrations of SCCPs and MCCPs in the meat and aquatic samples were measured using the comprehensive twodimensional gas chromatography electron capture negative ionization high-resolution time-of-flight mass spectrometry method. Forty-eight SCCP and MCCP homolog groups were detected in the meat and aquatic samples. The mean SCCP and MCCP concentrations in all meat samples were 129 ± 4.1 ng/g wet weight and 5.7 ± 0.59 ng/g wet weight, respectively. The concentrations of SCCPs and MCCPs in meat samples varied from different provinces. The geographical distribution of CP concentrationsin meat samples was similar to the distribution of CPs manufacturing plants in China. The most abundant groups of SCCPs in all meat samples were C10- 11 Cl6-7, and the most abundant groups of MCCPs in most samples were C14 Cl7-8. The possible sources of SCCPs and MCCPs in meat and meat products might be CP-42 and CP-52. The mean SCCP and MCCP concentrations in aquatic samples were 1472 and 80.5 ng/g wetweight, respectively. The dominant SCCP and MCCP congener groups in aquatic foods were similar to those in meat samples. The concentrations were much higher than those have been found in aquatic foods in other countries. The CP concentrations in the aquatic samples consumed by local people from eastern and southern China were higher than the concentrations in samples from central and western China. This preliminary risk assessment has indicated that the indirect exposure of SCCPs and MCCPs through meat and aquatic consumption does not pose significant risk to human health in China.

Dietary exposure to short- and medium-chain chlorinated paraffins in meat and aquatic products from China

256th National Meeting (2018)

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