云南不同地区稻谷中5种重金属元素分布特征

目的 研究8个不同地区稻谷中五种重金属元素含量, 分析不同地区稻谷中重金属元素分布特征。方法 采用电感耦合等离子体质谱法检测稻谷中总铬、镉、总砷、铅、总汞5种重金属元素含量; 利用主成分分析法对不同地区稻谷中重金属元素分布特征进行分析判别。结果 云南省不同地区稻谷中重金属元素具有不同特征, 超标率较低, 但是检出率较高, 尤其是总铬和镉的污染较为广泛。结论 云南省稻谷中重金属含量总体处于食品安全风险较低水平。但仍需进一步控制环境中重金属污染源头, 并做好稻谷中重金属水平的持续监测与风险评估。

Distribution characteristics of 5 heavy metal elements in rice in different regions of Yunnan

Objective To determine contents of five heavy metal elements in rice collected from eight areas of Yunnan and analyze the elements distribution characteristics in rice from different areas. Methods The contents of 5 heavy metals including chromium, cadmium, arsenic, lead and mercury in rice were detected by inductively coupled plasma mass spectrometry. The distribution characteristics of heavy metal elements in rice in different areas were analyzed and distinguished by principal component analysis. Results The heavy metal elements in rice from different regions of Yunnan province had different characteristics, and the rate of over-standard was lower, but the detection rate was higher, especially the pollution of total chromium and cadmium was more extensive. Conclusion The content of heavy metals in rice in Yunnan Province is generally at a low level of food safety risks. However, it is still necessary to further control the source of heavy metal pollution in the environment, and to conduct continuous monitoring and risk assessment of heavy metals in rice.