泥蚶对砷的积累效应及风险评价

通过对2013年12月到2015年6月养殖的泥蚶做跟踪调查，约每5个月采集一次样品进行总砷和无机砷的测定，计算泥蚶中总砷和无机砷的积累效应，并对其进行风险评价。结果表明:泥蚶随着养殖时间的增长对总砷的积累较强，呈正相关关系，对无机砷的积累整个过程无明显变化；泥蚶的肥满度与总砷含量呈显著正相关，与无机砷含量无显著关系。按照《海洋生物质量》标准进行评价，除苗蚶外均受到总砷的污染，按照《无公害食品水产品中有毒有害物质限量》标准，泥蚶均未受到无机砷的污染。根据联合国粮农组织和世界卫生组织下的食品添加剂联合专家委员会提出的暂定每周耐受摄入量（provisional tolerable weekly intake，PTWI）无机砷为15 μg/kg·bw。泥蚶中无机砷的每周评估摄入量（estimated weekly intake，EWI）值均小于PTWI，仅占PTWI的5.5%~6.2%，其消费引起的潜在致癌风险均为可接受风险。

Risk assessment and accumulation effects of arsenic in Tegillarcagranosa

Through tracking survey on cultured tegillarcagranosa from Dec 2013 to Jun 2015, the accumulation of total arsenic and inorganic arsenic were calculated by measuring once every 5 months, and risk assessment was thereby made.As the results showed, there was a positive correlation between cultured time and the accumulation of total arsenic, while there was no significant correlation between cultured time and the accumulation of inorganic arsenic.The fat content of the tegillarcagranosa was significantly positively correlated with the total arsenic content, while inorganic arsenic content was not significantly related.According to "Limit on Toxic and Hazardous Substances in Pollution-free Food and Aquatic Products", the cultured tegillarcagranosa was not polluted by inorganic arsenic.According to the Joint Committee of Food Additives under FAO and WHO, the provisional tolerable weekly intake PTWI of inorganic arsenic is 15 μg/kg·bw.The estimated weekly intake (EWI) of inorganic arsenic was lower than that of PTWI, accounting for only 5.5% to 6.2% of PTWI.The potential risk of cancer caused by consumption was within acceptable range.