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过去有资料曾介绍酸性液中硫酸和铜的分析,分别采用酸硷滴定法、电解法进行测定。该法精确性虽高,但耗时太长,不能适应生产上要求。我们采用硫酸和铜连续测定,其速度要比原来提高5～6倍,而且精确性也很好。试液中存在Fe~(3+)用氟化氢铵掩蔽,Sb、As用溴水氧化而消除干扰。一试剂氢氧化钠(0.5N)标准溶液:称取20克NaOH用水溶解,并于1升量瓶中稀至刻度。用邻苯二甲酸氢钾或草酸标定。硫代硫酸钠(0.1N)标准溶液:称取25克Na_2S_2O_3
In the past there was information on the analysis of sulfuric acid and copper in acidic solution, respectively, using acid-base titration, electrolysis were measured. Although the accuracy of the law is high, it takes too long and can not meet the requirements of production. We use sulfuric acid and copper continuous determination, the speed increased by 5 to 6 times than the original, but also very good accuracy. Fe ~ (3+) in the test solution is masked with ammonium bifluoride, and Sb and As are oxidized with bromine water to eliminate the interference. A reagent sodium hydroxide (0.5N) standard solution: Weigh 20 g NaOH dissolved in water and dilute to the mark in a liter flask. Potassium hydrogen phthalate or oxalic acid calibration. Sodium thiosulfate (0.1N) standard solution: Weigh 25g Na_2S_2O_3