Utilização de filtro de transformada de fourier para a minimização de ruídos em sinais analíticos

Química Nova

Eduardo O. Cerqueira²  Ronei J. Poppi²  Lauro T. Kubota²  Cesar Mello¹ 

[1],UNICAMP Instituto de Química Departamento de Química AnalíticaCampinas SP

关键词: Fourier transform;    digital filter;    analytical data;   

DOI  :  10.1590/S0100-40422000000500019

来源: SciELO

【 摘 要 】

Instrumental data always present some noise. The analytical data information and instrumental noise generally has different frequencies. Thus is possible to remove the noise using a digital filter based on Fourier transform and inverse Fourier transform. This procedure enhance the signal/noise ratio and consecutively increase the detection limits on instrumental analysis. The basic principle of Fourier transform filter with modifications implemented to improve its performance is presented. A numerical example, as well as a real voltammetric example are showed to demonstrate the Fourier transform filter implementation. The programs to perform the Fourier transform filter, in Matlab and Visual Basic languages, are included as appendices

【 授权许可】

CC BY-NC   
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