Artículos de revistas
Utilização de filtro de transformada de fourier para a minimização de ruídos em sinais analíticos
Utilization of fourier transform filter for noise minimization in analytical signals
Registro en:
Química Nova. Sociedade Brasileira de Química, v. 23, n. 5, p. 690-698, 2000.
0100-4042
S0100-40422000000500019
10.1590/S0100-40422000000500019
Autor
Cerqueira, Eduardo O.
Poppi, Ronei J.
Kubota, Lauro T.
Mello, Cesar
Institución
Resumen
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 690 698