容量法测定金合金中的金

Volumetric Determination of Gold in Gold Alloys

对重铬酸钾滴定过量硫酸亚铁返滴定法测定金合金中金的主要问题做了探讨和实验。拟定了简便、准确的测定方法,方法的重现性好,金含量为60%～99%时的相对标准偏差<0.2%。

The main problems in determination of gold by the back titration for the excessive FeSO4 with potassium bichromate were discussed and experimented. A simple, accurate and easy to operate method was developed. When the content of gold is from 60% to 99%, the relative standard deviation of 〈0.2% can be achieved.