摘要
建立了硝酸 盐酸 氢氟酸微波消解样品,氢化物发生ICP AES法测定煤中痕量砷的方法。考察了微波消解、酸性介质和硼氢化钠浓度的最佳条件。在选定的操作条件下,砷的检出限为0.3μg·L-1,相对标准偏差(n=5)小于4%。方法准确、快速,用本法测定国家标准参考物质的结果与推荐值一致。
A method for the determination of trace As in coal by microwave digestion and hydride generation ICP-AES has been reported. The digestion system of HNO_(3)-HCl-HF was evaluated. The experimental conditions of microwave digestion, acidic media and the concentration of sodium tetrahydroborate were investigated. Testing results showed that the detection limit was 0.3 μg·L^(-1) and RSD(n=5) was below 4%. This method was simple and rapid. The treatment method was applicable for As and gave results that were in good agreement with the certified values of the standard reference material.
出处
《分析科学学报》
CAS
CSCD
北大核心
2004年第1期23-25,共3页
Journal of Analytical Science
基金
国家重点基础研究发展规划资助项目(G1999022212
2002CB211602)
