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采用阳离子交换树脂 ,动态和静态交换相结合 ,对低氯浓度样品特别是雨水中的氯进行分离、提纯的简易方法。氯的回收率大于 97% ,能满足氯同位素质谱测定需要。氯同位素采用基于Cs2 Cl+ 离子的正热电离质谱法测定 ,结果表明分离过程无明显的同位素分馏 ,本方法为雨水的氯同位素地球化学研究提供了可能。
Using cation exchange resin, a combination of dynamic and static exchange, a simple method for separating and purifying chlorine in low chlorine concentration samples, especially in rainwater. The recovery of chlorine is more than 97%, which can meet the needs of chlorine isotope mass spectrometry. The determination of chlorine isotopes using Cs2Cl + ion-based positive ionization mass spectrometry showed that there was no obvious isotopic fractionation during the separation process. This method provided a possibility for the study of chlorine isotope geochemistry of rainwater.