上海食用鱼中短链氯化石蜡的污染特征

为了解长三角地区食用鱼中短链氯化石蜡(SCCPs)的污染特征,根据当地人的食鱼习惯,在上海采集了不同营养级的食用鱼8种,共计68尾,测定了肌肉中SCCPs含量并分析了其同族体的分布模式.结果表明,食用鱼肌肉中SCCPs的含量(干重,dw)范围为36～801 ng.g-1;同族体分布以C10-和C11-SCCPs为主,随着碳链长度的增加,SCCPs同族体含量所占比例随之降低,并且均以低氯(Cl6～Cl8)取代的SCCPs为主要组成部分,相对丰度之和占总丰度的61.46%～82.50%.上海食用鱼中SCCPs的含量在世界范围内处于中等水平,其分布模式与国内外研究一致.

Contamination Characteristics of Short-Chain Chlorinated Paraffins in Edible Fish of Shanghai

According to the local habit of eating fish, in a total of 68 samples, 8 kinds of different trophic levels of edible fish collected in Shanghai were determined in terms of concentration and distribution profile of short chain chlorinated paraffin (SCCPs) in muscles to investigate the pollution status of SCCPs in edible fish from the Yangtze River Delta region. The results indicated that the concentrations(dw) of SCCPs in edible fish were in the range of 36-801ng ·g^-1. With the increase in carbon chain length, the concentration of SCCPs decreased. In addition, lower chlorinated (Cl₆-Cl₈) and shorter chain (C₁₀, C₁₁) congeners were the dominant chlorine and carbon homologues groups, respectively, contributing a total relative abundance of 61.46%-82.50% to the total abundance of SCCPs. The levels of SCCPs in fish of Shanghai were in the medium level worldwide, and the distribution pattern was in line with those of the domestic and foreign studies.