【摘要】 提出了基于小波分析和偏最小二乘(Partial Least Squares,PLS)基础上的化学计量学方法用于示波计时电位同时测定铅和铊的研究。利用小波变换可方便地从dE/dt-E信号中滤噪,提取与去极剂浓度变化有关的信号,获得利于多组分测定的示波图。该方法为示波过程分析奠定了一定的基础。更多还原

【Abstract】 A new chemometrics method, which is based on the combination of wavelet transform (WT) and Partial Least Squares (PLS), is applied to simultaneous determination of Pb2 + and Tl+ mixtures by oscillographic chronopotentiometry. Wavelet transform was used to denoise dE/dt-E signal and got the signal that indicate the change of depolarizer. Then, the improved oscillograms for multi - component determination were obtained. The method proposed forms the base for the process analysis by oscillographic analysis.更多还原