M_6石墨炉原子吸收测定微量镉的方法研究  

The Analysis Method of Trace Cd in Samples by SOLAAR M_6 GFASS

作　　者：吴建政[1] 

机构地区：[1]河南省岩石矿物测试中心,郑州450053

出　　处：《矿产保护与利用》2002年第5期38-40,共3页Conservation and Utilization of Mineral Resources

摘　　要：研究了直接用标准溶液做曲线 ,SOLAARM6 石墨炉原子吸收测定样品中微量镉的分析方法 ,试样经酸分解 ,以 0 .2 %NH4 H2 PO4 — 0 .5 %Mg(NO3) 2 做改进剂 ,方法检出限为0 .0 0 8μg/ g(0 .2 0 0 0 0 g样品 ) ,经国家一级标准物质中镉的测定验证 ,结果与标准值相符 ,12次测定的RSD为 - 8.1%～ 4 .1% ,可用于测定水系、岩石矿物、选冶等样品中的微量镉。The analysis method of trace level Cd in samples was studied in the paper. Using standard solution to do the analysis calibration and SOLAAR M 6 GFASS as determination instruments, the samples ware dissolved. Using 0.2% NH 4H 2PO 4 0.5%Mg(NO 3) 2as modifier determined by SOLAAR M 6 GFASS, the detection limit is 0.008μg/g (0.20000g of sample). The method has been applied to the determination of trace Cd in the national standard samples. The results are in agreement with certified values with precision of -8.1% to 4.1% RSD(n=12). The method can be used in the determination of trace Cd in rock and mineral samples.

关 键 词：改进剂 石墨炉 原子吸收 岩石矿物 水系 

分 类 号：O614.242[理学—无机化学] P575.4[理学—化学]