Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/23447
Type: Artigo de periódico
Title: Utilização de filtro de transformada de fourier para a minimização de ruídos em sinais analíticos
Title Alternative: Utilization of fourier transform filter for noise minimization in analytical signals
Author: Cerqueira, Eduardo O.
Poppi, Ronei J.
Kubota, Lauro T.
Mello, Cesar
Abstract: 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
Subject: Fourier transform
digital filter
analytical data
Editor: Sociedade Brasileira de Química
Rights: aberto
Identifier DOI: 10.1590/S0100-40422000000500019
Address: http://dx.doi.org/10.1590/S0100-40422000000500019
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422000000500019
Date Issue: 1-Oct-2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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