Concentrations and health risk assessment of 24 residual heavy metals in Chinese mitten crab (Eriocheir sinensis)

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Lei Gao
Xiaoli Huang
Peng Wang
Zhongxiang Chen
Qirui Hao
Shuyan Bai
Shizhan Tang
Chenhui Li
Dongli Qin


China, Chinese mitten crab (Eriocheir sinensis), hazard index, trace metals, risk assessment


In this study, a total of 135 Chinese mitten crab (Eriocheir sinensis) samples were collected from four major crab-producing provinces (Jiangsu, Hubei, Anhui, and Liaoning) in China. The content of 24 trace elements in the edible parts of mitten crabs was determined by inductively coupled plasma mass spectrometry (ICP-MS). In addition, the content of trace elements in crab samples collected from different provinces was compared, and the heavy metal levels exceeding the standard were evaluated. Twenty four trace metallic elements were determined in Chinese mitten crab samples. The single factor pollution index (Pi), percentage of provisionally tolerable weekly intake (PTWI), and target hazard quotients (THQ) were used to evaluate the pollution level and food safety of Chinese mitten crabs. The final assessment results of dietary risks led to the health risk assessment accompanying food safety recommendations on Chinese mitten crabs. The overall finding of this study established that Chinese mitten crab aquatic products can be eaten for nutrition; however, attention should be paid on the potential food safety risks of some heavy metals. Moreover, efforts on developing the industrial economy by the local government and peoples’ safety from food risks may also increase the awareness of environmental protection.

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