摘要
探讨了零流电位法在氧化还原滴定中的检测原理及应用,通过考察硫酸铈滴定硫酸亚铁铵与硫酸亚铁铵滴定重铬酸钾两个滴定体系,探明了零流电位法在氧化还原滴定中的适用性。通过硫酸亚铁铵滴定重铬酸钾对本方法进行评价,实验结果表明:本法的相对误差为-0.10%,同一电极滴定结果的相对标准偏差(RSD)为0.15%(n=5),五根电极滴定结果的RSD为0.16%。本方法具有较高的准确性、精密度和再现性。
The measurement principle and application of zero current potentiometry in redox titration were discussed.Both the titrations of ammonium iron sulfate by ceric sulfate and potassium bichromate by ammonium iron sulfate were tested to demonstrate the applicability of zero current potentiometry in redox titration. Overall method performance was investigated using the titration of potassium bichromate by ammonium iron sulfate. The relative error of this method was-0. 10%. The RSD of the same electrode was 0. 15%（ n = 5） and the RSD of five electrodes was 0. 16%. The experimental results showed that zero current potentiometry exhibits higher accuracy,stability and repeatability.
出处
《广州化工》
CAS
2015年第3期127-129,151,共4页
GuangZhou Chemical Industry
关键词
氧化还原滴定
电位滴定
零流电位法
redox titration
potentiometric titration
zero current potentiometry
