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乳酸已证实为锡(IV)的良好隐蔽剂,并能用于锡的置换滴定,选择性高,可快速测定锡基或铅基合金中的锡。本工作以乳酸隐蔽大量锡作铜的滴定以及铜锡的连续滴定,以进一步证明乳酸的隐蔽效能;且联合使用乳酸和硫脲为隐蔽剂,可作锡铜和铅的连续滴定或隐蔽锡和铜作铅的滴定。测定锡基合金中的锡铜和铅来校验本法,发觉效果良好。
Lactic acid has proven to be a good concealment agent for tin (IV) and can be used for the displacement titration of tin with high selectivity for rapid determination of tin in tin-based or lead-based alloys. In this work, lactic acid was used to conceal a large amount of tin for titration of copper and continuous titration of copper and tin to further prove the concealment effectiveness of lactic acid. The combined use of lactic acid and thiourea as a concealment agent can be used for continuous titration or concealment of tin and copper Copper for lead titration. Determination of tin-tin alloy tin and lead to check the law, found to be effective.