沉淀滴定计算分析法同时测定溴酸根与碘酸根  

Simultaneous Determination of Bromate and Iodate by Precipitation Titrimetry

作　　者：张云[1] 徐刚[1] 江勇[1] 朱仲良[1] 

机构地区：[1]同济大学化学系,上海200092

出　　处：《分析化学》2002年第5期605-607,共3页Chinese Journal of Analytical Chemistry

摘　　要：以银电极为指示电极 ,Ag+ 标准溶液为滴定剂 ,对BrO-3、IO-3单种离子及BrO-3与IO-3的混合离子进行了测定。结果表明 :BrO-3或IO-3单种离子 ,测定误差小于 1 % ;BrO-3与IO-3混合离子 ,IO-3的测定误差约为 1 % ,但BrO-3的测定误差较大。此外 ,对BrO-3、IO-3与Ag+ 沉淀反应的动力学行为进行了研究 ,并对产生误差的原因进行了讨论。The single component of BrO - 3 or IO - 3 and the mixture of BrO - 3 and IO - 3 were determined respectively through potentiometric titration using silver electrode as the indicator electrode and AgNO 3 as the titrant. The relative error was below 1% for the determination of single component of BrO - 3 or IO - 3.In the mixture of BrO - 3 and IO - 3,a high accuracy could be obtained for the determination of IO - 3,but a systematic error was observed for the determination of BrO - 3. The kinetic processes of the precipitation reactions were also studied by connecting the electrode system to a computer with analog/digital card. It was found the equilibrium of precipitation reaction could be reached within 2 min between IO - 3 and Ag +, and within 6 min between BrO - 3 and Ag +.

关 键 词：滴定计算分析法 同时测定 溴酸根 碘酸根 沉淀滴定 电位滴定 

分 类 号：O655.2[理学—分析化学]