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合质金中金的测定,由于误差要求严,样品均匀性较差;所以直到目前,国内外多采用火试金法作为标准方法.而火试金法又存在污染环境、劳动强度大等缺点.于是,近年来国内在化学分析方法上做了不少工作,国外相继出现了采用库仑法和电位法测定合质金中的金.鉴于氢醌与金反应,具有较高的灵敏性和选择性,氧化还原电位为0.699伏特,在一定酸度下,其溶液非常稳定,所以氢醌是测定金的一个很好的滴定剂.D.I.Ryabc-hikov等人早在1939年于微酸性溶液中,
The determination of gold and gold in gold, due to the strict requirements of the error, the sample uniformity is poor; so far, at home and abroad to use more than gold as the standard method of fire test method, and fire test method has the disadvantages of polluting the environment and labor intensity Therefore, in recent years, a lot of work has been done in the field of chemical analysis methods in China, and the gold in gold has been successively measured by Coulomb method and potentiometric method in foreign countries. In view of the reaction of hydroquinone with gold, it has high sensitivity and selectivity The oxidation and reduction potential of 0.699 volts, the solution is very stable at a certain acidity, so the hydroquinone is a good titration of gold.DIRyabc-hikov et al as early as 1939 in a slightly acidic solution,