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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。
A new chemometric method based on wavelet analysis and Partial Least Squares (PLS) is proposed for simultaneous determination of lead and thallium by oscillometric chronopotentiometry. Using wavelet transform, it is easy to filter out noise from dE / dt-E signal and extract the signal related to the change of the concentration of the depolarizing agent to obtain the oscillogram which is beneficial to the multi-component determination. The method lays a solid foundation for the analysis of the oscillometric process.