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用于地球化学探矿的氯碘分析方法已有一些报道,但至令尚感缺乏一个较理想的方法。有的方法灵敏度不够,有的又麻烦或分析条件要求太高,不适合大批样品分析。笔者在前人工作的基础上试验了碳酸钠—氧化锌半熔分解样品,用抗坏血酸还原高价碘,离子电极连续测定碘氯的方法。样品测定下限达到碘0.25ppm,氯50ppm。精度能满足要求,方法简便,成本低。初试地质效果良好。
There have been some reports of methods for the analysis of chloride and iodine used in geochemical prospecting, but it is still a lack of a more ideal method. Some methods sensitivity is not enough, and some troubles or analytical conditions require too much, not suitable for a large number of sample analysis. Based on the work of predecessors, the author tested the method of semi-melting sample of sodium carbonate-zinc oxide, reducing high iodine with ascorbic acid and continuously measuring iodine with ion electrode. The lower limit of determination of the sample reached 0.25ppm of iodine and 50ppm of chlorine. Accuracy to meet the requirements, the method is simple and low cost. First test geological effect is good.