发射光谱法测定勘查地球化学样品中银硼锡钼铅

Determination of Silver,Boron,Tin,Molybdenum and Lead in Geochemical Exploration Samples by Emission Spectrometry

以K2S2O7、NaF、Al2O3和炭粉为缓冲剂，Ge为内标，电弧发射光谱法测定勘查地球化学样品中Ag、B、Sn、Mo、Pb。方法检出限为Ag0．013μg／g、B0．83μg/g、Sn0．23μg／g、Mo0．073μg/g、Pb0．37μg／g。方法精密度（RSD，n=12）为Ag4．2％～11．3％、B3．2％～6．5％、Sn2．6％～7．1％、Mo2．9％～6．3％、Pb1．57％～5．18％。测定了国家一级地球化学标准物质，结果与标准值相符。

A method for the determination of silver, boron, tin, molybdenum and lead in geochemical exploration samples by emission spectrometry is developed. K2S2O7, NaF, Al2O3 and carbon powder are used as buffers and Ge as internal standard. The detection limits of the method are 0.013 μg/g for Ag, 0.83 μg/g for B, 0.23 μg/g for Sn, 0.073 μg/g for Mo and 0.37 μg/g for Pb. The precision of the method are 1.57%～11.3% RSD （n = 12） for these 5 elements. The accuracy of the method has been verified by determination of these 5 elements in national geochemical standard samples and the results are in agreement with certified values. Thousands of geochemical samples have been analyzed by this method with satisfactory results.