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近年来,关于锡的催化极谱测定报导较多。为了测定化探样中的微量锡,我们在资料的基础上,对伏安法条件进行了摸索,证明提高测定溶液的流速,有利于电极清洗,使波高稳定;并对共存元素的干扰及其消除进行了试验。根据试验,拟定了化探样中微量锡的分析规程。锡量在0.05～2Jg/25ml范围内与催化电流成线性关系。本法不需分离,可直接分液测定,方法简便、快速、准确。本法可测1～200雌g/g范围的锡。含量在3.3、9.0、30Jg/g的样品,相对标准偏差分别为10、6、3.5％。 一、仪器与试剂
In recent years, there are many reports on the determination of tin by catalytic polarography. In order to determine trace tin in geochemical samples, we studied the conditions of voltammetry on the basis of data, and proved that increasing the flow rate of the measurement solution is conducive to electrode cleaning and stabilizing the wave height. The interference of coexisting elements and its Elimination was tested. According to the experiment, the analytical rules of trace tin in geochemical exploration samples have been drawn up. Tin content in the range of 0.05 ~ 2Jg / 25ml and catalytic current into a linear relationship. This method does not require separation, direct determination of liquid, the method is simple, fast and accurate. This method can measure 1 ~ 200 female g / g range of tin. The samples with contents of 3.3, 9.0 and 30 Jg / g showed relative standard deviations of 10, 6 and 3.5% respectively. First, equipment and reagents