Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, P R China.
Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2012;29(9):1465-74. doi: 10.1080/19440049.2012.694121. Epub 2012 Jul 5.
A total of 175 samples of 18 types of food were collected from markets in Shanghai, China, and the concentrations and bioaccessibility of 15 priority-controlled polycyclic aromatic hydrocarbons (PAHs) in these samples were determined. The mean concentrations of PAHs varied between 2.4 and 47.1 ng g(-1) wet weight, with the highest being observed in snail and lowest in chicken. The concentrations were lower than the maximum levels of PAH allowed for food per EU regulations. Among the PAHs measured, phenanthrene was the predominant one. Most of the PAHs originated from pyrogenic sources, analysed using molecular indices. The mean bioaccessibility of PAHs varied from 29.0% to 61.2% as measured by simulating the human gastrointestinal digestion process. Linear relationships between the bioaccessibility and lipid contents were observed for most PAH congeners. The daily intake of PAHs by an average Shanghai resident was 848 ng day(-1) and decreased to 297 ng day(-1) when the bioaccessibility of PAHs were considered, demonstrating that most intake might have been overestimated. According to the potency equivalent concentrations and screening values of PAHs, consumption of snail and clam, especially snail, should be limited.
本研究从中国上海的市场中采集了 175 份 18 种不同类型的食品样本，对这些样本中 15 种优先控制的多环芳烃（PAHs）的浓度和生物可给性进行了测定。PAHs 的浓度范围为 2.4-47.1ng/g（湿重），螺类中的浓度最高，鸡肉中的浓度最低。这些浓度均低于欧盟法规允许的食品中 PAH 的最大含量。在所测定的 PAHs 中，以菲为主。使用分子指标分析，发现大部分 PAHs 来源于高温源。通过模拟人体胃肠道消化过程，测得 PAHs 的平均生物可给性为 29.0%-61.2%。大多数 PAH 同系物的生物可给性与脂类含量之间存在线性关系。按生物可给性校正后，上海市居民的 PAHs 日摄入量为 848ng/人·天，比不考虑生物可给性时的估算值（1245ng/人·天）减少了 30%。根据 PAHs 的效价当量浓度和筛选值，建议限制食用螺类和贝类，尤其是螺类。
