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依据金的化学性质和物理性质及在自然界中存在的形态,从试样中把金溶解成为离子形态,用活性炭通过动态吸附进行金的富集,通过灼烧炭化过程,使其形成单质金,使用王水通过二次溶金加入氯化钾饱和溶液,使其形成较稳定的钾盐,用已知浓度的氢醌标准溶液进行滴定,根据消耗氢醌标准溶液的体积和浓度,可计算出试样中金的含量(克/吨)。在探讨氢醌容量法分析金的操作过程中,依据经典经验和本人在平时实际操作工作中积累的分析经验,重点指出在使用氢醌容量法分析金的过程中,应掌握的关键操作步骤和关键操作步骤中应注意的重要操作事项及影响分析结果准确性的存在因素。通过本人实际操作分析反复比对论证,提出了提高分析结果准确度的操作要点,供广大黄金分析者参考运用。
According to the chemical and physical properties of gold and the existing form in nature, the sample is dissolved into ion form of gold, activated carbon by dynamic adsorption of gold enrichment by burning carbonization process to form a single gold, The use of aqua regia through secondary dissolution of potassium chloride saturated solution to form a more stable potassium salt, with a known concentration of hydroquinone standard solution titration, consumption of hydroquinone standard solution volume and concentration can be calculated Sample gold content (g / t). Based on the classical experience and the analysis experience accumulated in the practical work, we point out the key operation steps that should be grasped in the process of analyzing the gold by the hydroquinone volumetric method Key operational steps should pay attention to the important operational issues and the impact of the accuracy of the analysis of the existence of factors. Through the analysis of repeated comparison and verification of my actual operation, this paper puts forward the operational points for improving the accuracy of the analytical results for the reference of the golden analysts.