在线小波变换用于伏安分析仪的研制

An Application of On-line Wavelet Transform to the Development of Voltammetric Analyzer

将在线小波变换应用于伏安信号的在线处理,研制了具有小波变换功能的伏安分析仪.该系统利用在线小波变换对采集到的数据进行实时处理,具有控制灵活、分辨率高、数据处理方便等特点.通过对低浓度Cu^(2+)和Fe^(3+)混合样品的阶梯斜坡扫描伏安信号的滤噪及定性、定量分析,结果表明可获得满意的分析结果.

A voltammetric analyzer with on-line wavelet transform was developed based on an on-line algorithm of the wavelet transform. With this analyzer, the voltammetric signal can be processed along with the progress of sampling. By investigation of staircase voltammetric data of Cu2+ and Fe3+ samples in KCl solution, it was indicated that after on-line decomposition by wavelet transform,the noise was cleanly filtered, the linear relationship between the peak height and the concentration remained, and it was also useful for extracting the qualitative information from weak signals of low concentration samples. Therefore, it may be a good way to improve the signal-to-noise ratio and to extend the linear range of detection by using the on-line wavelet transform in a voltammetric analyzer.