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针对活性炭吸附—碘量法测定地质样品中金的过程可能出现的一些问题进行了探讨,通过实验对试样焙烧、活性炭加入量等影响分析结果准确度的主要因素进行了总结。该方法具有较好的适用性和可操作性,相对标准偏差小于1.12%,回收率达到94.29%～98.86%。
Some problems that may arise in the determination of gold in geological samples by activated carbon adsorption - iodometry are discussed. The main factors influencing the accuracy of the analytical results, such as sample calcination and the amount of activated carbon, are summarized through experiments. The method has good applicability and operability, the relative standard deviation is less than 1.12% and the recovery rate is 94.29% ~ 98.86%.