ISO 11427:1993 银和银珠宝合金的测定.溴化钾容量法

标准编号：ISO 11427:1993

中文名称：银和银珠宝合金的测定.溴化钾容量法

英文名称：Determination of silver in silver jewellery alloys — Volumetric (potentiometric) method using potassium bromide

发布日期：1993-05

标准范围

规定方法的原理是将样品溶解在稀硝酸中，并通过使用标准溴化钾溶液滴定测定所得溶液中的银含量，使用电位滴定法指示等效点。合金最好在ISO 9202规定的细度范围内，可含有铜、锌、镉和钯。钯必须在开始滴定前沉淀，除此之外，这些元素不会干扰该测定方法。

The principle of the method specified is dissolving the sample in dilute nitric acid and determining the silver content of the resulting solution by titration with standard potassium bromide solution, using a potentiometric indication of the equivalence point. The alloys, preferably within the range of fineness stated in ISO 9202, may contain copper, zinc, cadmium and palladium. Apart from palladium, which must be precipitated before commencing titration, these elements do not interfere with this method of determination.

标准预览图