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发射光谱法具有检出限低和多元素同时测定的能力,是分析单矿物中杂质元素的理想手段之一。它在黄铁矿物分析的应用上也已取得了一定的进展。但这些方法的不足之处是耗样量较多,不能作微量矿物分析,或则测定元素欠少。本文根据黄铁矿和磁黄铁矿的光谱分析特征,研究了同时测定其中多种杂质元素的分析条件,采用碳酸钡作缓冲剂,结合使用快速曝光和分段曝光的办法,拟定了仅用6mg矿物即可同时测定23种杂质元素的分析方法,取得了满意的结果。
Emission spectrometry with low detection limit and simultaneous determination of multiple elements is one of the ideal methods to analyze the impurity elements in single minerals. It has also made some progress in the application of pyrite analysis. However, the disadvantages of these methods are more sample consumption, can not be used for trace mineral analysis, or less elements to be measured. In this paper, based on the spectral analysis of pyrite and pyrrhotite, the conditions for the simultaneous determination of various impurity elements in the pyrite and pyrrhotite were studied. Using barium carbonate as buffering agent, a combination of rapid exposure and segmented exposure, 6mg minerals can simultaneously determine the determination of 23 kinds of impurity elements, and achieved satisfactory results.