Abstract: For the first time,this paper presents spline wavelets application to step voltammetry signals,The method has advantages as follows:taking short time to deal with all data,having no necessary to find the relations with variables in any other systems,handling the target functions and initial conditions directly from sample data and obtaining few data necessarily.Some reasonable noises are added to the theoretical data,Signal-to-noise ratio varies from 0.1 to 100.The result is satisfactory and exciting even if the S/Nratio decreases to 0.15.Experimental data from a low concentration of Ti(Ⅳ)-H₂C₂O₄ and W (Ⅳ)+Mo(Ⅳ)-HAPP-KClO₃ system are utilized to demonstrate the application of wavelet analysis.The agreement between the theoretical and experimental results is excellent.

Key words: Step voltammetry, Spline wavelets analysis, Spline wavelets basis