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前言铁矿中亚铁和全铁的测定,工业上一般采用分别取样,分别测定的方法,而且多采用重铬酸钾法,不可避免要造成环境的污染。本法在前人解决了抗坏血酸稳定度的前提下,把抗坏血酸用于铁矿中铁的连测。即以“硫酸—氢氟酸”于聚四氟乙烯塑料坩埚中,先用高锰酸钾滴定亚铁后,然后以磺基水杨酸作指示剂,用抗坏血酸滴定全铁。本法测定误差基本符合工业上的要求。
Preface The determination of ferrous and ferrous iron in the iron ore, the industry generally use separate sampling, respectively, the determination of the method, and more potassium dichromate method, will inevitably lead to environmental pollution. This law in the previous solution to the stability of ascorbic acid under the premise of the use of ascorbic acid iron in iron even test. That is, “sulfuric acid - hydrofluoric acid” in polytetrafluoroethylene plastic crucible, titration of ferrous sulfate with potassium permanganate, and then sulfosalicylic acid as an indicator of total ascorbic acid titration. The error of this method is basically in line with industrial requirements.