Baseline Correction in Standard Addition Voltammetry by Discrete Wavelet Transform and Splines

Abstract

Abstract A new algorithm for background correction in voltammetry based on Discrete Wavelet Transform (DWT) conjugated with spline functions is presented. This procedure simplifies selection of the peak position and optimization of the approximation procedure parameters by lowing the resolution of the signal in the process of the wavelet decomposition. Background approximation by splines and its subtraction is performed in the wavelet domain. Likewise the elimination of high frequency components in signals is conducted simultaneously. The reliability of the results obtained in the standard addition method was tested on simulated curves with real background and Pb(II) signals registered in CRM.