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随着地质成矿理论研究工作的发展,单矿物分析要求测定主量、次量、痕量各项元素,特别是痕量元素。本项研究工作采用等离子光量计同时测定黄铁矿单矿物中的多项元素。取样量为100mg,经硝酸分解,过滤,溶液通过阳离子树脂,分离出大部分属于易挥发元素的11个痕量元素,进行测定。留在树脂上的其他约17个元素被全部洗脱。与受逆王水溶解或碱熔的残渣合并,在另一分析程序中进行测定。采取阳离子树脂分离方案是因为样品中铁的含量太大,严重干扰痕量元素的测定。痕量元素的测定限为ppm级,其变动系数为4～13%,残渣被酸溶或碱溶:前者可测定黄铁矿单物中各元素,后者可测定除前者各元素外,还可测定特殊需要的Al、Ti、Sn等元素的余量。本法分析黄铁矿的取样量比化学方法的取样量相比减少3/4,分析时间缩短3/4,测定元素多达28个。
With the development of the research on the geo-mineralization theory, the single mineral analysis requires the determination of the major, minor and trace elements, especially the trace elements. This work uses the plasma spectrophotometer to simultaneously determine a number of elements in a single mineral pyrite. Sampling volume of 100mg, the nitric acid decomposition, filtration, the solution through the cationic resin, most of the 11 volatile elements are isolated trace elements were measured. About 17 other elements left on the resin were eluted. Combined with the residue dissolved by the aqua regia or alkali fusion, the determination is carried out in another analysis program. Cationic resin separation scheme is taken because the iron content in the sample is too large, seriously interfering with the determination of trace elements. Determination of trace elements is limited to the ppm level, the coefficient of variation of 4 ~ 13%, the residue was acid-soluble or alkali soluble: the former can be determined pyrite a single element, which can be determined in addition to the former elements Determination of special needs of Al, Ti, Sn and other elements of the balance. This analysis of pyrite sampling volume than the chemical sample volume compared to reduce 3/4, analysis time is shortened by 3/4, determination of elements up to 28.