Effects of tuna pate thickness and background on CIEL alpha beta color parameters and reflectance spectra

Measuring color is important for classifying raw materials and for knowing how technological processes affect the same. Objective color can be studied by means of CIEL alpha beta coordinates and reflectance spectra, both physical methods being simple and non-destructive. For fish and fish products n...

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Bibliographic Details
Published in:Food control 2011-08, Vol.22 (8), p.1226-1232
Main Authors: Sanchez-Zapata, E, Fuentes-Zaragoza, E, De Vera, CNavarro-Rodriguez, Sayas, E, Sendra, E, Fernandez-Lopez, J, Perez-Alvarez, JA
Format: Article
Language:English
Subjects:
Marine
Thunnus
Online Access:Get full text
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Summary:Measuring color is important for classifying raw materials and for knowing how technological processes affect the same. Objective color can be studied by means of CIEL alpha beta coordinates and reflectance spectra, both physical methods being simple and non-destructive. For fish and fish products no standard or specific recommendations exit as regards sample thickness and background when evaluating color. In this work the reflectance spectra (360-740 nm) and CIEL*a*b* coordinates of tuna pate are described against different background colors and for different sample thickness. Background color was seen to be important not only for the measurement of thinner samples. When white paper, yellow plastic, black plastic or aluminum foil are used as background, the pate sample thickness had no effect on the color measurement. In the case of tuna pate, sample thickness must be taken into consideration only when white ceramic or white plastic are used as background.
ISSN:0956-7135
DOI:10.1016/j.foodcont.2011.01.022