应用发射光谱法测定地球化学样品中微量银的方法改进
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摘要
应用发射光谱法测定地球化学样品中微量银的方法,由于基体差异,存在大量样品与合成硅酸盐光谱分析标准物质之间一致性较差,低含量段准确度和精密度均不理想的问题。通过减少取样量,增加试样与缓冲剂混合比例,改进电极形状的措施,可实现国家一级标准物质测定值与合成硅酸盐光谱分析标准物质工作曲线吻合较好。银检出限:0.010μg/g,精密度:3.9%~9.1%。
By using emission spectrometry to determine the micro-silver in geochemical samples,because of the fundamental difference,we have found there is a large amount of sample and synthetic silicate spectrometry which is very poor in low accuracy. Their precision is not ideal. In this article,by reducing the sample size,we are ready to increase the mix of sample and buffer to improve the shape of the electrodes. It is possible to meet the national level of standard material and the synthesis of the standard material. Silver detection limit is 0. 010 μg/g with precision between 3. 9% ~ 9. 1%.
By using emission spectrometry to determine the micro-silver in geochemical samples,because of the fundamental difference,we have found there is a large amount of sample and synthetic silicate spectrometry which is very poor in low accuracy. Their precision is not ideal. In this article,by reducing the sample size,we are ready to increase the mix of sample and buffer to improve the shape of the electrodes. It is possible to meet the national level of standard material and the synthesis of the standard material. Silver detection limit is 0. 010 μg/g with precision between 3. 9% ~ 9. 1%.
引文
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[5]黄劲,龚园.两米光栅摄谱仪对化探样品中铅、锡、银的测定方法讨论及改进[J].新疆有色金属,2011,34(2):45-46.
[6]邱宏喜,寇德凯,龙志武,等.发射光谱法测定地球化学样品中银硼钼锡的影响因素[J].四川地质学报,2014,34(s):91-98.
[7]叶家瑜,江宝林.银量、硼量、锡量、铅量及稼量的测定交流水平电极发射光谱法编制说明,区域地球化学勘查样品分析方法[M].北京:地质出版社,2004.
[8]中华人民共和国国土资源部.DZ/T0130.1-2006地质矿产实验室测试质量管理规范[S].北京:中国标准出版社,2006.
[2]杨胜科,张文英,程果莲,等.平头电极发射光谱分析法测定化探样品中痕量银的研究[J].西北地质,1995,16(4):81-83.
[3]张庆华,万飞,杨婷.发射光谱深孔大电极法测定硼、锡、银[J].吉林地质,2009,28(2):110-112.
[4]曹成东,魏轶,刘江斌.发射光谱法同时测定地球化学样品中微量银铍硼锡铋钼[J].岩矿测试,2010,29(4):458-460.
[5]黄劲,龚园.两米光栅摄谱仪对化探样品中铅、锡、银的测定方法讨论及改进[J].新疆有色金属,2011,34(2):45-46.
[6]邱宏喜,寇德凯,龙志武,等.发射光谱法测定地球化学样品中银硼钼锡的影响因素[J].四川地质学报,2014,34(s):91-98.
[7]叶家瑜,江宝林.银量、硼量、锡量、铅量及稼量的测定交流水平电极发射光谱法编制说明,区域地球化学勘查样品分析方法[M].北京:地质出版社,2004.
[8]中华人民共和国国土资源部.DZ/T0130.1-2006地质矿产实验室测试质量管理规范[S].北京:中国标准出版社,2006.