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介绍了一种用Na2 CO3+K2 CO3 混合熔剂对岩石样品进行分解 ,用硼特效树脂和阴、阳混合离子交换树脂相结合进行岩石样品中硼的纯化分离的方法。采用该方法从岩石样品中提取、分离出来的硼能满足硼同位素质谱法测定的需要 ,不产生硼同位素分馏 ,硼同位素测定精度大多优于 0 .0 5%。
A method for separating and purifying the rock sample by combining Na2CO3 + K2CO3 mixed fluxes with rock sample and combining the boron special effect resin and the mixed ion exchange resin of anion and cation was introduced. The boron extracted from rock samples by this method can meet the need of boron isotope mass spectrometry, does not produce boron isotope fractionation, and the boron isotope determination accuracy is better than 0.05%.