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金在自然界中存在得比较分散,含量较低。因此,在金的化学分析中,为了将金富集到适宜测定的程度,需要采用不同的富集方法。我们用717阴离子交换树脂做成离子交换树脂袋(简称树脂袋),对富集不同量的金进行了探讨,取得了较为满意的效果。为了适应对微量(～0.1克/吨)金的测定,重点对结晶紫光度进行了一些试验。此外,对较高品位金的测定也相应地做了一些工作。全部工作包括含量在0.1—40000克/吨模围内金的的测定;测定方法除结晶紫光度法外,还包括原子吸收法和碘量法以及新涉及的有关问题。在富集金的问题上,我们提出的作为一种新富集方式所应用的离子交换树脂袋,还不能看作是最完美的形式,仍有待于在实践中不断完善和提高。
Gold exists in nature more dispersed, lower content. Therefore, in the chemical analysis of gold, different enrichment methods are required in order to enrich the gold to a suitable degree of determination. We use 717 anion exchange resin made of ion exchange resin bags (referred to as resin bags), the enrichment of different amounts of gold were discussed, and achieved satisfactory results. In order to adapt to the determination of trace amounts (~ 0.1 g / t) of gold, some experiments on the crystal violet intensity were emphasized. In addition, the determination of higher grade gold has also done some work accordingly. All the work includes the determination of the content of gold in the 0.1-40000 g / t mode; determination method in addition to the crystal violet spectrophotometry, including atomic absorption spectrometry and iodometry and the related issues involved. On the issue of gold accumulation, the ion exchange resin bag that we propose as a new enrichment method can not be regarded as the most perfect form yet and needs to be continuously improved and improved in practice.