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Type: Artigo de periódico
Title: Determinação de açúcar total em café cru por espectroscopia no infravermelho próximo e regressão por mínimos quadrados parciais
Title Alternative: Determination of total sugar in raw coffee using near infrared spectroscopy and pls regression
Author: Morgano, Marcelo A.
Faria, Cristiano Gomes de
Ferrão, Marco F.
Ferreira, Márcia M.C.
Abstract: In this work a fast method for the determination of the total sugar levels in samples of raw coffee was developed using the near infrared spectroscopy technique and multivariate regression. The sugar levels were initially obtained using gravimety as the reference method. Later on, the regression models were built from the near infrared spectra of the coffee samples. The original spectra were pre-treated according to the Kubelka-Munk transformation and multiplicative signal correction. The proposed analytical method made possible the direct determination of the total sugar levels in the samples with an error lower by 8% with respect to the conventional methodology.
Subject: total sugar
raw coffee
near infrared spectroscopy
Editor: Sociedade Brasileira de Química
Citation: Química Nova. Sociedade Brasileira de Química, v. 30, n. 2, p. 346-350, 2007.
Rights: aberto
Identifier DOI: 10.1590/S0100-40422007000200020
Date Issue: 1-Apr-2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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