Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/200809
Type: Artigo de periódico
Title: Near Infrared Emission Photometer For Measuring The Oxidative Stability Of Edible Oils.
Author: Vieira, Francisco Senna
Pasquini, Celio
Abstract: Near infrared emission spectroscopy (NIRES) allows the determination of the induction time (IT) of edible oils in accelerated oxidation experiments by monitoring the emissivity of a band at 2900 nm, which corresponds to the formation of hydroperoxides. In this work, a new near infrared emission photometer dedicated to the determination of oxidative stability is described. The photometer presents several advantages compared to the previously reported NIRES instrument, such as lower cost and extreme simplicity of design and maintenance. The results obtained in the evaluation of the proposed instrument were compared with the official Rancimat method and instrument. The significant advantages include: faster analysis, lower sample consumption and operational simplicity. It is demonstrated that the procedure for determination of oxidative stability of oils can be significantly simplified and performed by measuring the sample emission at only one spectral region centered at 2900 nm. Also, the proposed instrument and method present precision equivalent to the Rancimat method (coefficient of variation=5.0%). A significant correlation between the methods has been found (R(2)=0.81).
Subject: Equipment Design
Oils
Oxidation-reduction
Spectroscopy, Near-infrared
Time Factors
Autoxidation
Edible Oil
It
Instrumentation
Nires
Near Infrared Emission Photometer
Oxidative Stability
Induction Time
Near Infrared Emission Spectroscopy
Rights: fechado
Identifier DOI: 10.1016/j.aca.2013.08.028
Address: http://www.ncbi.nlm.nih.gov/pubmed/24016589
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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