摘要
[目的]快速准确测定大米中几种重金属元素含量，为大米中的重金属污染情况研究提供参考。[方法]采用微波消解法，应用电感耦合等离子体质谱（ ICP－MS）技术同时测定了大米中Pb、As、Cd、Hg、Cr、Cu、Zn、Se 8种元素的含量，优化了测定条件。[结果]试验表明，该方法测定的大米中8种元素在线性范围内相关系数均大于0．9996，检出限范围为0．18～20．00μg／kg；回收率为91．6％～106．0％，相对标准偏差为0．5％～9．7％。[结论]该方法具有简便、灵敏、准确的特点，适用于大米中Pb、As、Cd、Hg、Cr、Cu、Zn、Se含量的检测。
Abstract
Objective] The aim was to determine several heavy metals content in rice rapidly and accurately, to provide reference for research on heavy metal pollution in rice.[Method] The content of lead, arsenic, cadmium, mercury, chromium, copper, zinc and selenium in rice were determined by inductively coupled plasma mass spectrometry (ICP-MS) with microwave digestion.The conditions for the determination of 8 ele-ments were optimized.[Result] The results showed that the correlation coefficient of 8 elements in rice is greater than 0.999 6 in the linear range, the detection limit is 0.18 -20.00 μg/kg, the recovery rate is 91.6%-106.0%, the relative standard deviation is 0.5%-9.7%. [Conclusion] The method is simple, sensitive and accurate.It is suitable for the detection of the content of lead, arsenic, cadmium, mercury, chromium, copper, zinc and selenium in rice.
国家科技期刊平台
NSTL
维普
万方数据