Abstract: In order to investigate the heavy metal contamination status of Sagittaria sagittifolia at main producing areas in China，timely find out quality and safety hazards，and scientifically prevent and control heavy metals risk in aquatic vegetables，this study from 2019 to 2021 continuously collected batch 175 samples from major production bases of Sagittaria sagittarius in Hubei，Jiangsu，Zhejiang Provinces and Guangxi Zhuang Autonomous Regio；monitored the contents of 7 kinds heavy metals；and conducted dietary exposure risk assessment by index of food safety（IFS）method．The results showed that the overall pass rate of heavy metals in Sagittaria sagittata samples was 98.3%．The detection rates of Cu，As and Cd all were 100.0%. The detection rates of Cr，Pb，Ni and Hg were 78.8%，69.7%，36.6% and 20.0%，respectively．Among them，the exceeding standard rates of As and Cd were 1.1% and 0.6%，respectively．Two batches of As over-standard samples and one batch of Cd over-standard sample were from Jiangsu Province，Hubei Province and Guangxi Zhuang Autonomous Region，respectively．Judging from the safety index evaluation results，both IFS and IFS of 7 kinds heavy metals in Sagittaria sagittata were far less than 1，indicating that the overall exposure risk was within the acceptable range.

Key words: Sagittaria sagittifolia, heavy metal, contamination situation, food safety index, riskassessment

摘要： 为调查我国主要产区慈姑中重金属污染状况，及时发现质量安全隐患，科学防控水生蔬菜重金属风险，2019—2021年在我国慈姑主产区湖北省、江苏省、浙江省和广西壮族自治区的生产基地连续采集 175批次样品，监测7种重金属含量，并采用食品安全指数（index of food safety，IFS）法进行膳食暴露风险评估。结果表明，慈姑样品中重金属总体合格率为98.3%；铜、砷和镉的检出率均达100.0%，铬、铅、镍和汞的检出率分别为78.8%、69.7%、36.6%和20.0%。其中，砷和镉的超标率分别为1.1%和0.6%，2批次砷超标样品和1批次镉超标样品分别来自江苏省、湖北省和广西壮族自治区。从食品安全指数评价结果来看，慈姑中 7种重金属的IFS和IFS都远小于1，整体暴露风险处于可接受范围。

关键词: 慈姑, 重金属, 污染状况, 食品安全指数, 风险评估