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关于全铁的测定,在生产实际中可靠且常用的是重铬酸钾法,但该法用的试剂氯化汞有毒,造成环境污染.近年来逐步推广的无汞定铁法仍需采用重铬酸钾,六价铬盐亦属有毒试剂.因此人们正在探索新的测铁方法,以克服上述方法的弊病.本文所探讨的交流示波极谱定铁方法不用氯化汞和重铬酸钾,准确度符合一般常量分析要求.方法具有设备简单、终点直观、快速、应用范围广的优点.交流示波极谱滴定就是用交流示波曲线(dE)/(dt)=f(E)上切口的出现或消失来指示滴
About total iron determination, in the production of reliable and commonly used is potassium dichromate method, but the method of mercury chloride poisoning, resulting in environmental pollution. In recent years, the gradual promotion of mercury-free iron law still need to use heavy Potassium Chromate and Hexavalent Chromium are also toxic reagents, therefore, new methods of iron determination are being explored to overcome the shortcomings of the above methods.The AC Oscillopolarographic determination of iron in this paper does not use mercuric chloride and dichromic acid Potassium, the accuracy of which meets the requirements of the general constants analysis. The method has the advantages of simple equipment, direct endpoint, fast application and wide range of applications. The AC oscillographic titration is performed with an alternating current oscillometric curve (dE) / (dt) = f The appearance of the incision or disappearance to indicate drops