交流示波极谱法中i~f-E曲线的研究 7:基于i~f-E曲线的定量分析方法

本文提出基于i~f-E曲线的定量分析方法,并在自行研制的微机电化学数据采集系统上,测定了微量的Tl^+、Pb^2+、Cd^2+、Zn^2+、Mn^2+和Ga^3+.结果表明,与经典的dE/dt-E曲线方法相比,i~f-E曲线方法的准确度提高了2-5倍、灵敏度提高了一个数量级.

Investigations on i~f-E curve in cyclic derivative chronopotentiometry.pt 7:quantitative analysis based on i~f-E curves

Quant. anal. in cyclic derivative chronopotentiometry with if-E curve is based on measurement of the height of peak on the if-E curve. The main advantage of the method over the classical dE/dt-E curve method is in its accuracy and sensitivity. In this paper, Tl+, Pb2+, Cd2+, Zn2+, Mn2+, and Ga3+ were determine with the microcomputer-based electrochem. data acquisition system, which was constructed in the laboratory Experimental results have shown that in the if-E curve method the accuracy is 2 to 5 times better and the sensitivity is one order of magnitude higher.