【摘要】 介绍了一种分离岩石中微量铅及超微量铅的新方法。在此方法中首先采用Dowexl×8阴离子交换树脂,使铅与绝大多数金属离子分离,然后采用阳极电解法使铅进一步纯化。全流程空白为(2～4)×10-11g/mg。这样制备出的样品消除了铅质谱分析的干扰元素,提高了质谱测试精度。质谱分析时,采用NBS981对铅同位素进行分馏校正,进一步提高了分析精度,质谱测试精度均高于1‰。更多还原

【Abstract】 The authors reports a new method of separating micro lead and super micro lead from rock, in which Dowex l×8 anion exchanged resin is used. First,the micro lead is separated from most metallic ions. Second, the lead is purified by using the method of the anodic electrolyze. The background of the process is （2～4）×10^-11g/mg. In this way,there are no interference elements in the sample of mass spectrum analysis and the precision of mass spectrum analysis is improved. When analysing mass spectrum of the lead the authors can calibrate the fractionation of the lead isotope by NBS981.The higher precision of mass spectrum analysis can be obtained. The precision of mass spectrum analysis is up to 1‰.更多还原