临汾市售蔬菜中多环芳烃污染特征及致癌风险分析

Characterization and Cancer Risk Assessment of PAHs in Vegetables Sold in Linfen City,China

为了研究临汾市食物中多环芳烃(PAHs)的污染特征及对人群的健康影响,本研究于2015年1月采集当地居民普遍食用的9种蔬菜,利用气相色谱-质谱联用仪(GC-MS)检测蔬菜中8种多环芳烃(Nap、Ace、Acy、Fle、Phe、Ant、Flu、Pyr)。研究表明,PAHs在9种蔬菜中均有检出,PAHs的总浓度范围是24.86~82.85 ng·g^(-1),平均为44.13 ng·g^(-1)。其中PAHs含量最高的是圆白菜(82.85 ng·g-1),最低的是山药(24.86 ng·g^(-1))。通过来源分析发现来源地蔬菜中PAHs主要来源于液体化石燃料燃烧。临汾市不同人群食用蔬菜引起的终身增量致癌风险(ILCR)在1.27×10^(-6)~7.07×10^(-6)范围内,在目前蔬菜消费量下存在潜在致癌风险。

In order to determine the pollution characteristics of polycyclic aromatic hydrocarbons（ PAHs） in food and assess the consequent health effects of the population in Linfen,nine kinds of vegetables were commercially collected from the markets of Linfen in January 2015,which are widely consumed by local residents. Concentrations of eight PAHs（ Nap,Ace,Acy,Fle,Phe,Ant,Flu and Pyr） were quantified using gas chromatography-mass spec-trometry（ GC-MS）. PAHs were detectable in all kinds of vegetables,and the total PAHs concentrations ranged from 24. 86 ng·g^-1to 82. 85 ng·g^-1,with a mean of 44. 13 ng·g^-1. The highest level of total PAHs was detected in cabbage（82. 85 ng·g-（-1）） whereas the lowest concentration was found in yam（24. 86 ng·g^-1）. Source analysis suggested that liquid fossil-fuel combustion mainly contributed to the concentration of PAHs. The incremental lifetime cancer risk（ ILCR） ranged from 1. 27 × 10^-6to 7. 07 × 10^-6,indicating a potential carcinogenic risk for local residents under the current consumption amount of vegetables.