固体粉末进样交流电弧法测定区域地球化学调查样品中痕量银、硼、锡、铅  

Determination of trace Ag,B,Sn and Pb in regional geochemical survey samples by solid powder sample AC arc method

作　　者：杨俊[1] 林庆文[1] 刘瑱 刘玉纯 马玲[1] 袁孝友[2] YANG Jun;LIN Qingwen;LIU Zhen;LIU Yuchun;MA Ling;YUAN Xiaoyou(Institute of Geological Experiment of Anhui Province, Hefei230041, China;Anhui University, Hefei230039, China)

机构地区：[1]安徽省地质实验研究所,合肥230041 [2]安徽大学,合肥230039

出　　处：《化学分析计量》2018年第3期16-19,共4页Chemical Analysis And Meterage

基　　金：安徽省省级地质勘查专项基金项目(2011–g–28)

摘　　要：采用固体粉末进样交流电弧法测定区域地球化学调查样品中的痕量银、硼、锡、铅。对实验条件进行了优化,激发电流为14 A,曝光时间为40 s。选择内标元素为锗,银、硼、锡、铅的分析线波长分别为328.07,249.77,283.99,283.31 nm;内标线波长分别为303.91,270.96,270.96,270.96 nm。分别在含量0.05~3,10~140,1~50,10~100μg/g范围内,银、硼、锡、铅含量的对数与分析线、内标线的黑度差呈良好的线性关系,相关系数分别为0.998 2,0.998 8,0.999 6,0.999 0,检出限分别为0.01,1.1,0.2,0.7μg/g。用所建方法对土壤成分分析标准物质GBW07446,GBW 07453和水系沉积物成分分析标准物质GBW 07302a,GBW 07303a,GBW 07304a进行测试,银、硼、锡、铅的测定值与标准值的对数差分别为–0.007~0.024,–0.031~–0.013,0.000~0.029,0.002~0.028,测定结果的相对标准偏差分别为7.3%~9.3%,6.0%~9.9%,6.5%~9.0%,6.5%~9.9%(n=12)。该方法操作简单、快速,环境友好,适合于区域地球化学调查样品中痕量银、硼、锡、铅的分析。Solid powder sample AC arc method was applied to the determination of trace Ag, B, Sn and Pb in regional geochemical survey samples. The optimized conditions found were as follows： excitation current was 14 A, exposure time was 40 s. The internal standard element was Ge. The wavelength of the analytical lines of Ag, B, Sn, Pb was 328.07, 249.77, 283.99, 283.31 nm, and the internal line wavelength was 303.91, 270.96, 270.96, 270.96 nm, respectively. Logarithm of Ag, B, Sn, Pb mass fraction was linear with the difference of blackness in the range of 0.05-3, 10-140, 1-50, 10-100 μg/g, respectively, the correlation coefficients were 0.998 2, 0.998 8, 0.999 6, 0.999 0, and detection limits were 0.01, 1.1, 0.2, 0.7μg/g, respectively. Certified reference materials for the chemical composition of soil （GBW 07446, GBW 07453） and stream sediment （GBW 07302a, GBW 07303a, GBW 07304a） were tested by the method. The logarithmic difference of results and the certified values for Ag,B,Sn, Pb was -0.007-0.024, -0.031- -0.013, 0.000-0.029, 0.002-0.028, respectively, and the relative standard deviations were 7.3%-9.3%, 6.0%-9.9%, 6.5%-9.0%, 6.5%-9.9%（n=12）, respectively. The method is simple, rapid and environmentally friendly, it is suitable for the analysis of trace Ag, B, Sn and Pb in regional geochemical survey samples.

关 键 词：固体粉末进样 交流电弧法 银 硼 锡 铅 

分 类 号：O657.3[理学—分析化学]