碘量法和铈量法测定过氧化氢的研究

Research of the iodometric and cerous sulfate determination of concentration hydrogen peroxide solution

分别阐述了碘量法和铈量法测定过氧化氢的原理,研究了这两种方法测定时的影响因素,并对其结果进行了比较。研究结果表明:碘量法和铈量法的相对误差和RSD都很小,适合测定过氧化氢。相对于碘量法,铈量法的标准溶液稳定,影响因素少,使其测定结果更精确。

The principle of iodometric and cerous sulfate determination of concentration hydrogen peroxide solution were described in the article. The optimum conditions and the comparison of their results for the two methods＇ determination were investigated in detail. The results showed that variable coefficient and relative error of the two methods were very small. They could be used to determine hydrogen peroxide. Because the cerous sulfate titration has the advantage of stabilization of standard solution and without any side reactions, the results obtained by cerous sulfate titration were precise than them obtained by iodomeetric titration .