Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China.
J Agric Food Chem. 2020 Dec 9;68(49):14594-14602. doi: 10.1021/acs.jafc.0c05227. Epub 2020 Nov 13.
Organochlorine pesticides (OCPs), chemicals frequently used in agriculture, are a group of highly toxic and persistent organic pollutants. This study assesses the distribution and congener profiles of residual OCPs in 11 types of vegetable oils collected from Chinese markets. All samples were extracted using the modified QuEChERS method prior to analysis by gas chromatography-triple quadrupole mass spectrometry. The sesame oil samples had the highest concentration of OCPs, within the range of 15.30-59.38 ng/g, whereas the peanut oil samples had the lowest OCP concentrations, within the range of 10.83-35.65 ng/g. The possible effect of the processing technology on the pesticide residues in these vegetable oils was also evaluated. It was found that the pressing method leaves more OCPs in vegetable oils than the aqueous extraction and cold-pressing, but the result for leaching was not obvious. In light of the obtained results, it was estimated that the average daily intake of different pesticides is between 0.01 and 2.20 ng/kg bw/day for urban and rural households. Hence, it can be affirmed that, given the amount of the concentration of OCPs detected in the vegetable oils collected from Chinese markets, there are no obvious health risks for urban and rural households by intake.
有机氯农药（OCPs）是农业中常用的一类高度有毒和持久性有机污染物。本研究评估了 11 种市售植物油中残留 OCPs 的分布和同系物特征。所有样品均采用改良的 QuEChERS 方法提取，然后用气相色谱-三重四极杆质谱法进行分析。芝麻油样品中 OCPs 的浓度最高，范围为 15.30-59.38ng/g，而花生油样品中 OCPs 的浓度最低，范围为 10.83-35.65ng/g。还评估了加工技术对这些植物油中农药残留的可能影响。研究发现，压榨法比水提取和冷榨法在植物油中留下更多的 OCPs，但浸出法的结果并不明显。根据获得的结果，估计城乡家庭每天通过不同农药的摄入量在 0.01 至 2.20ng/kg bw/day 之间。因此，可以肯定的是，考虑到从中国市场采集的植物油中检测到的 OCPs 浓度，城乡家庭通过摄入这些 OCPs 不会产生明显的健康风险。
