陕南地区地球化学调查样品中24种元素测定方法的选择及应用

门倩妮; 郑艳荣; 卢泽众; 王真; 王丛

doi:10.11973/lhjy-hx202010003

陕南地区地球化学调查样品中24种元素测定方法的选择及应用

Selection and Application of Determination Methods of 24 Elements in Geochemical Survey Samples in Southern Shaanxi

摘要

摘要: 对陕南地区地球化学调查样品中24种元素（Ti、P、Cu、Zn、Cr、Ni、Nb、Zr、Sr、Rb、Ga、Li、Be、U、Th、Pb、Bi、Mo、W、Hf、Cs、La、Cd、Co）的测定方法进行了选择。Ga、Li、Be、U、Th、Pb、Bi、Mo、W、Hf、Cs、La、Cd、Co采用电感耦合等离子体质谱法进行测定，Ti、P、Cu、Zn、Cr、Ni、Nb、Zr、Sr、Rb采用X射线荧光光谱法进行测定。采用混合酸敞开溶样-电感耦合等离子体质谱法测定Hf时，需进行数学公式校正，Hf的校正结果与Hf的认定值相符，Hf校正结果的相对标准偏差（n=12）不大于5.8%。方法的精密度和准确度合格率均为100%，密码重复性样品的合格率不小于96.6%，异常点重复性样品的合格率不小于97.0%，各元素报出率不小于95.5%，符合规范DZ/T 0011-2015的要求。

Abstract: Determination methods of 24 elements (Ti, P, Cu, Zn, Cr, Ni, Nb, Zr, Sr, Rb, Ga, Li, Be, U, Th, Pb, Bi, Mo, W, Hf, Cs, La, Cd and Co) in geochemical survey samples in southern Shaanxi were selected. Ga, Li, Be, U, Th, Pb, Bi, Mo, W, Hf, Cs, La, Cd and Co were determined by ICP-MS, and Ti, P, Cu, Zn, Cr, Ni, Nb, Zr, Sr and Rb were determined by XRFS. ICP-MS with sample dissolution by open mixed acid was applied to the determination of Hf, and then formula correction was used. The calibration results of Hf were consistent with the certified values of Hf with RSDs (n=12) of the calibration results of Hf no more than 5.8%. The qualified rates of precision and accuracy of the methods were all 100%, the qualified rates of repeatability samples of cipher were not less than 96.6%, the qualified rates of repeatability samples of abnormal point were not less than 97.0%, and the report rates of the elements were not less than 95.5%. These indicators met the requirements of standard DZ/T 0011-2015.
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