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 +.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2002年第5期605-607,共3页
Chinese Journal of Analytical Chemistry
