中文摘要：

为研究有机氯农药在食物中的残留及人群的摄食暴露,在2015年5月采集了南京市居民普遍食用的10种蔬菜,利用气相色谱-质谱联用仪（GC-MS）进行检测。研究表明滴滴涕（DDTs）和六六六（HCHs）在蔬菜中均有检出,∑DDTs的残留量为1.78～5.29 ng·g^（-1）,∑HCHs的残留量为0.21～4.77 ng·g^（-1）,其中∑10OCPs（有机氯农药）含量最高的蔬菜是藕（10.07 ng·g^（-1））,含量最低的是青菜（2.32 ng·g^（-1））。通过来源分析发现,蔬菜中DDTs可能有新的输入,而HCHs则主要源于历史残留。通过对不同人群的每日摄取量（EDI）进行摄食暴露分析发现,儿童的摄食暴露量要高于同性别其他年龄段人群,在儿童和未成年阶段,男性的暴露量普遍高于女性,而在成年和老年阶段,男性的暴露量低于女性。平均而言,各年龄段人群对γ-HCH和DDTs的日均口摄暴露量（EDI）值远低于联合国粮农组织和世界卫生组织（FAO/WHO）所规定的ADI值,表明在目前蔬菜消费量下,南京市居民通过摄入蔬菜引起的健康风险水平较低。

英文摘要：

To determine the organochlorine pesticide residues in food and assess the consequent ingestion exposurefor the population in Nanjing, 10 kinds of vegetables that are widely consumed by the local residents were commercially collected in May 2015. Concentrations of DDTs and HCHs were determined using gas chromatography-mass spectrometry（GC-MS）. DDTs and HCHs were detectable in all kinds of vegetables, and the residual amounts of ∑DDTs and ∑HCHs were 1.78-5.29 ng·g-1and 0.21-4.77 ng·g-1respectively. The highest residual ∑10OCPs was 10.07 ng·g-1in lotus root and the lowest was 2.32 ng·g-1in greens being. Source analysis suggested that recent application of DDTs probably contributed to its residual, whereas HCHs were mainly derived from the historical vestigital.Estimated daily intakes（EDI） of both DDTs and HCHs for children were higher than other age groups of the same gender. With respect to gender, dietary exposure to males was higher than that to females in children and adolescents,whereas lower in adults and old-ages. The daily intakes of γ-HCH and DDTs for all groups were far below the acceptable amounts suggested by the Food and Agriculture Organization of the United Nations/World Health Organization, indicating a low risk level for local residents under the current amount of vegetables consumption.