Fourier自去卷积示波计时电位法的研究

经典的示波计时电位法一般用ｄＥ/ｄｔＥ曲线上的切口深度进行定量测定 .由于施加于电解池的极化电流频率较高 ,使方法灵敏度和分辨率大大降低 .通过选择适当的体系、改进方法等手段可改善示波图的分辨率和提高灵敏度13],但二者常常不能同时兼备 .Ｆｏｕｒｉｅｒ自去卷积 (ＦＳＤ)是以Ｆｏｕｒｉｅｒ变换为基础、主要用于重叠峰解析的信号处理技术4 ].它可使信号中峰形变窄、处理后峰的位置不发生变化 .然而 ,由于线性函数和滤噪函数的选择比较困难 ,使其应用受到了限制 .本文探讨了使用小波变换所得模糊项作为线性函数的可能性 ,并将改进…

Oscillographic Chronopotentiometry with Fourier Self-deconvolution

The classical Fourier self deconvolution has the problem in selecting simulated function and filter function, so its application in resolving overlaped peaks is limited. In this paper, using coarser approximation obtained after wavelet transform as line shape function, a new electroanalytical method, Fourier self deconvolution oscillographic chronopotentiometry is founded. Experimental results show that this method can not only improve the resolution power and sensitivity, but also make selection of parameters in the processing of Fourier self deconvolution easy and simple.