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研究了采用电感耦合等离子质谱仪(ICP-MS)同时测定地质样品中V、Cr、Co、Ni、Cu、Zn、Mo、Ag、Cd、W、Pb、Bi等多种元素的方法。试样用王水、高氯酸、氢氟酸溶解,硝酸定容,以103Rh为内标,采用在线加入方式,ICP-MS测定。实验表明,该方法精密度好,测定结果的相对标准偏差一般在0.02%～2.76%之间,大部分元素RSD<1%;准确度好,标准样品测定结果与推荐值有较好的符合性;检出限为0.1ng/mL。该方法操作简单、快速、准确,可应用于批量化探样品多种元素的测定。
The method for the simultaneous determination of V, Cr, Co, Ni, Cu, Zn, Mo, Ag, Cd, W, Pb and Bi in geological samples by inductively coupled plasma mass spectrometry (ICP-MS) was studied. Samples with aqua regia, perchloric acid, hydrofluoric acid dissolved, nitric acid volume, 103Rh as internal standard, using online addition, ICP-MS determination. The experimental results show that the method has good precision and the relative standard deviations (RSDs) of the determination results are generally between 0.02% and 2.76%, most of the elements have RSD <1%. The accuracy of the method is good, and the results of the standard samples are in good agreement with the recommended values ; Detection limit of 0.1ng / mL. The method is simple, rapid and accurate and can be applied to the determination of various elements of batch geochemical exploration samples.