摘要:
本实验采用湿法消解碳酸盐岩矿石样品,利用电感耦合等离子体发射光谱仪(ICP-AES),采用内标法和基体匹配法相结合测定了碳酸盐岩标准物质(GBW10035a)中高达54%的氧化钙主量元素含量及其它常微量元素的含量;对实际样品中微量元素进行样品加标回收率实验,对主量和常量元素采用稀释法验证。实验结果表明,样品加标回收率在94%~108%之间,稀释比率在99.4%~100.2%,标准物质测定值与标准值吻合,6次平行样测定的稳定性<4%;该方法一次溶样,径向测定主量和常量元素,轴向测定微量元素含量,操作简单,快速,该方法适用于盐湖碳酸盐样品,以及其他含有碳酸盐的各类样品的分析测试。
关键词:
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地矿
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碳酸盐岩
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氧化钙
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常微量元素
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ICP
Abstract:
In this paper, CaO up to 54% and other major and minor elements in limestone (GBW03105a ) certified reference material using wet digestion were determined with the method of combining internal standard and matrix matching by ICP-AES. Sample recoveries and dilution rates were respectively processed to test minor elements and high content elements. The results were satisfactory with recoveries of 94%~108%, dilution rates of 99.4%~100.2% and stability low 4% (n=6). Experiment data were in very good agreement with certified values. This method was adopted to the analysis of limestone sample in geological survey with the advantages of simple operation, high accuracy, precision and repeatability.
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