Potentiometric titrations using dual microband electrodes.
Potentiometric titrations using dual microband electrodes.
复制标题
使用双微带电极进行电位滴定。
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
D. Williams
中科院分区：
文献类型：
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作者：
H. Rajantie;D. Williams
我们提出了一种新的分析方法，使用电位终点检测和双微带电极在发生器-收集器模式。滴定剂使用恒定电流或随时间线性增加的电流电生成，并且反应性材料的通量而不是摩尔量被平衡。斜波电流系统优于恒流方法的优点在于，在单次扫描过程中即可获得完整滴定曲线和正确分析所需的所有信息。该法已用于铁氰化物与维生素C的测定和碘与硫代硫酸盐和亚硫酸盐的测定。作为一种新型的分析方法，电位滴定法使用溶解银微带电极以产生滴定剂。该系统已应用于氯离子、碘离子、硫代硫酸根和氰化物的检测。分析的准确度为+/-10%，主要受当前丝网印刷工艺的限制，并且该方法非常适合于毫摩尔级的测量。
We present a novel method of analysis using potentiometric end-point detection and dual microband electrodes in generator-collector mode. The titrant is electrogenerated using either a constant current or a current that increases linearly with time, and the fluxes of reactive material rather than molar amounts are balanced. The advantage of the ramp current system over the constant current method is that all of the information needed for a full titration curve and a proper analysis can be obtained during a single scan. The method was applied to the determination of vitamin C with ferricyanide and to the determination of thiosulfate and sulfite with iodine using gold microband electrodes. As a new type of analysis, a potentiometric titration that uses dissolving silver microband electrodes in order to generate the titrant is demonstrated. The system was applied to the detection of chloride, iodide, thiosulfate and cyanide. The accuracy of the analysis is +/-10%, limited mainly by the present screen-printing process, and the method is well adapted for measurements on the millimolar scale.