Detection and Dietary Risk Assessment of Several Heavy Metals in Rice from Different Origin in Heilongjiang Province
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Abstract:
In this paper, inductively coupled plasma mass spectrometry (ICP-MS) was used to analyze cadmium, lead, chromium and arsenic in rice which were collected from five major rice producing areas of Heilongjiang (Chahayang, Wuchang, Fangzheng, Xiangshui and Jiansanjiang). The contents of the four elements (cadmium, lead, chromium, and arsenic) were tested and analyzed, and the exposure to four elements in rice was evaluated by monthly intake value (EMI) and lead exposure boundary ratio (MOE) for the residents in this area. The results showed that the measured average contents of four element (cadmium, lead, chromium, and arsenic) were 0.85×10-2 mg/kg, 0.40×10-2 mg/kg, 1.07×10-1 mg/kg and 1.14×10-1 mg/kg, respectively, and the coefficient of variation range is 0.32~2.53, which is within the national standard. The exposure boundary ratio of lead in the population of Heilongjiang province was 45.06~982.48; the monthly intake of cadmium, chromium and arsenic were measured to be 0.17~3.22 μg/kg·BW, 11.77~26.49 μg/kg·BW and 22.596~31.394 μg/kg·BW, accounting for 0.6%~12.8%, 46.7%~92.2%, 1.5% ~ 2.1% of the JECFA prescribed limits respectively, which did not exceed the JECFA prescribed limits. The content of cadmium, lead, arsenic and chromium in rice in the five major producing areas of Heilongjiang province and the population intake are generally at a safe level.
