摘要
研究了微波消解-电感耦合等离子体质谱(ICP-MS)测定玉米中重金属元素的方法。详细讨论了微波样品溶液制备、质谱仪干扰扣除及校准等,在优化的试验条件下,根据国家标准参考物质(GBW10012)的分析结果评价方法的准确性。方法检出限为:Cd:0.003μg/g,Cr:0.04μg/g,Pb:0.1μg/g,相对标准偏差在2.5%-6.0%之间,加标回收率在90.9%-104.9%之间。
Studies the method to determine heavy-metal elements in the corn,by ICP-MS using microwave digestion.Microwave sample preparation,mass spectrograph interference deduction and calibration are discussed in detail.In the optimized conditions,according to analysis results of national standard reference materials(GBW10012),evaluate the accuracy of method.The detection limit:Cd:0.003μg/g,Cr:0.04μg /g,Pb:0.1 μg/g,the relative standard deviation 2.5%~6.0%,and the recovery rate 90.9%~104.9%.
出处
《吉林地质》
2013年第4期117-119,共3页
Jilin Geology