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在发射光谱分析中应用化学反应的方法,能改善分析检出限和分析精度,在纯物质中杂质元素分析和矿物原料中痕量元素分析方面得到了相当多的应用。对反应机理、反应条件和反应剂的选择等方面作了一定的研究。在矿物原料分析中,常用的化学反应有氯化反应、碘化反应、氟化反应和硫化反应。其中以氯化反应最为有效,应用也较为广泛。本文报导了利用CuCl、NH_4Cl为反应剂,同时测定岩石土壤中W、Sn、Mo.Pb、Bi、Cd、Ga、Ge、In、Tl、Zn等十一个痕量元素的试验结果。1.反应剂混合物的选择
The application of chemical reactions in emission spectroscopy can improve the analytical detection limits and analytical precision, and has obtained quite a lot of applications in impurity element analysis of pure substances and trace element analysis in mineral raw materials. The reaction mechanism, reaction conditions and the choice of reactants made some researches. In the analysis of mineral raw materials, commonly used chemical reactions are chlorination, iodination, fluorination and sulfidation reactions. Among them, the chlorination reaction is the most effective and the application is also more extensive. This paper reports the experimental results of the simultaneous determination of eleven trace elements W, Sn, Mo.Pb, Bi, Cd, Ga, Ge, In, Tl and Zn in rock and soil using CuCl and NH_4Cl as reactants. 1. The choice of reactant mixture