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本文用抗坏血酸作为铁的滴定剂,铜不干扰,继用碘量法测定铜。方法可用于含铜1%以上的矿物及材料中铁铜的测定. 一试剂抗坏血酸:0.02N,用经离子交换树脂处理过的蒸馏水配制,每2000毫升溶液加2毫升0.025M EDTA及4毫升甲酸作稳定剂。凡拉明蓝指示剂:1%盐酸(2N)溶液. 二条件试验 1 铁的测定及铜的影响用抗坏血酸作为还原滴定剂直接滴定铁,文献中没有指出铜对测定的影响。我们用按不同比例混合的铁铜溶液进行试验。滴定铁的适宜条件是酸度0.1～0.2N(盐酸),温度50～60℃,用凡拉明蓝作指
In this paper, ascorbic acid as a titration agent of iron, copper does not interfere with the determination of copper following the iodometric method. Method for the determination of iron and copper in minerals and materials containing more than 1% copper 1 Ascorbic acid: 0.02N, formulated with ion-exchange resin-treated distilled water, 2 ml 0.025 M EDTA and 4 ml formic acid per 2000 ml solution stabilizer. Flavin blue indicator: 1% hydrochloric acid (2N) solution. Two conditions test 1 Determination of iron and copper impact Ascorbic acid as a titrant titration of direct titration of iron, the literature did not indicate the impact of copper on the determination. We use different proportions mixed with iron and copper solution for testing. Titration of iron suitable conditions are acidity 0.1 ~ 0.2N (hydrochloric acid), the temperature of 50 ~ 60 ℃, with Flavin blue as a sign