交流电弧直读原子发射光谱法测定地球化学样品中银、硼、锡、钼、铅的方法研究

发布时间：2018-11-19 14:00

【摘要】：本文建立了交流电弧直读原子发射光谱法测定地球化学样品中银、硼、锡、钼、铅的分析方法。以K_2S_2O_7、NaF、Al_2O_3、碳粉为缓冲剂,Ge为内标,优选了分析线对,曝光时间为25s,同时扣除分析线和内标线背景。选取国家一级地球化学标准物质(GBW07103、GBW07104、GBW07107、GBW07312、GBW07302a、GBW07304a、GBW07305a、GBW07307a、GBW07406、GBW07446、GBW07454、GBW07456)作为标准系列,以对数坐标二次曲线拟合标准曲线,并采取两次平行分析取平均值的计算方法。方法检出限为:Ag:0.011×10~(-6)、B:0.54×10~(-6)、Sn:0.19×10~(-6)、Mo:0.034×10~(-6)、Pb:0.66×10~(-6),精密度为:Ag:4.01%~8.33%、B:3.77%~7.86%、Sn:2.94%~8.17%、Mo:3.03%~10.94%、Pb:2.01%~11.11%。经岩石、水系沉积物、土壤国家一级标准物质验证,测定值与认定值符合。本方法操作简便、工作效率高,是一种新的测定地球化学样品中银、硼、锡、钼、铅的分析方法,可推广应用于大批量地球化学样品的分析测试。
[Abstract]:A method for the determination of silver, boron, tin, molybdenum and lead in geochemical samples by direct reading atomic emission spectrometry with AC arc has been established. Based on K2S2O7NaF2OAl2O3, carbon powder as buffers and Ge as internal standard, the analytical line pair was selected with exposure time of 25s, and the background of the analytical line and the internal marking line was deducted at the same time. The national primary geochemical standard material (GBW07103,GBW07104,GBW07107,GBW07312,GBW07302a,GBW07304a,GBW07305a,GBW07307a,GBW07406,GBW07446,GBW07454,GBW07456) is selected as the standard series, and the standard curve is fitted with the logarithmic quadratic curve. Two parallel analyses are used to calculate the average value. The detection limits were Ag:0.011 脳 10 ~ (-6), B: 0.54 脳 10 ~ (-6), Sn:0.19 脳 10 ~ (-6), Mo:0.034 脳 10 ~ (-6), Pb:0.66 脳 10 ~ (-6). The precision was Ag:4.01%~8.33%,. B: 3.77m and 7.86cm: 2.94your wife is 8.17. and you have Mo3.03. you have 10.94, you know, Pb: 2.01and 11.11. The measured values are in accordance with the determined values by the national standard materials of rock, river sediment and soil. This method is a new method for the determination of silver, boron, tin, molybdenum and lead in geochemical samples.
【作者单位】：中国地质科学院地球物理地球化学勘查研究所;中国地质大学(北京)地球科学与资源学院;
【基金】：中央级公益性科研院所基本科研业务费专项项目(AS2013J11) 国土资源部公益性行业科研专项项目(编号201211081) 国土资源大调查项目(编号1212011120950,1212011220598)资助的成果
【分类号】：P632

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