活性炭吸附ICP-MS测定矿石样品中金铂钯

Determination of Au,Pt and Pd in Ore Samples by ICP-MS after Preconcentration Using Activated Carbon

矿石样品经王水消解后,用纯化后的活性炭动态吸附溶液中的金、铂、钯,用电感耦合等离子体质谱法测定。对分析条件进行了选择,在用盐酸和甲醛赶尽硝酸后,在10%盐酸体系中,吸附率最大且相对稳定。选定的分析波长Au为197 nm,Pt为195 nm,Pd为105 nm。对方法的精密度及样品加标回收率进行了测试实验。该方法操作简便、分析速度快,有效降低了测试过程的空白值。检出限分别为Pt 0.8 ng/g,Pd 0.4 ng/g,Au 0.5 ng/g。

After the ore samples was digested with HNO 3 and HCl(1+3),Au,Pt and Pd in the solution were dynamically adsorbed by the purified activated carbon and determined by inductively coupled plasma mass spectrometry.The conditions for the analysis were chosen.After quenching the nitric acid with hydrochloric acid and formaldehyde,the adsorption efficiency was the largest and relatively stable in the 10%hydrochloric acid system.Selected analysis wavelength Au was 197 nm,Pt was 195 nm and Pd was 105 nm.The precision of the method and the sample spike recovery were tested.This method had the advantages of convenience,fastness and effectively reducing the blank value of the test process.The detection limits were Pt 0.8 ng/g,Pd 0.4 ng/g and Au 0.5 ng/g.