KClO_3中ClO_2^-的定量分析(Ⅰ)碘量滴定法  

Determination of ClO_2^- ion in KClO_3(Ⅰ) Iodometric Method

作　　者：毛立可[1] 赵临远[1] 梁少俊[1] 

机构地区：[1]广西师范大学化学化工学院,广西桂林541004

出　　处：《化工时刊》2008年第1期28-31,共4页Chemical Industry Times

摘　　要：配制ClO3-和微量ClO2-混和存在的溶液,ρ(ClO3-)=34.1 g/L,ρ(ClO2-)=208 mg/L,尝试以碘量法直接测定其中亚氯酸根离子的含量。考察了测定条件及向待测溶液中添加ClO4-离子对分析结果的影响,确定了适用方法的测定程序、精密度、准确度和该方法可以较方便检测的最低ClO2-浓度。测定过程的关键之处是使用约0.5 mol/L的盐酸来调节待测溶液的pH值。The mixture solution of ClO3^- and trifle amount ClO2^-, in which ρ（ ClO3^ - ） = 34.1 g/L, p（ ClO2^- ） = 208 mg/L, was prepared, and the ClO2^- concentration in the solution was tried to be determined directly by iodometric method. The influences of varying the detecting conditions and adding ClO4^- to the solution on the results were investigated. The procedure, precision, accuracy, and the least detectable ClO2^- concentration of the method, were obtained. In the analysis process, the pH value of the solution to be detected should be adjusted by 0.5 mol/L HCl.

关 键 词：氯酸钾 亚氯酸根离子 定量分析 碘量法 

分 类 号：O655.22[理学—分析化学]