Visual Color Deterioration in Blackcurrant Syrup Predicted by Different Instrumental Variables
- 1 November 1983
- journal article
- Published by Wiley in Journal of Food Science
- Vol. 48 (6) , 1745-1749
- https://doi.org/10.1111/j.1365-2621.1983.tb05075.x
Abstract
The ability of several instrumental methods to predict visual color deterioration in blackcurrant syrup was studied using a linear calibration method. Commercial syrup was used in a storage experiment to generate samples of a wide color quality range. Packaging material greatly influenced color stability, storage time varied from 2 months with high‐density polyethylene bottles, to 8 months with polyvinylchloride, 12 months with polyester and more than 18 months with glass bottles. Combinations of Hunter L', a' and b' values and of absorbances at three selected wavelengths, the absorbance ratio A520/A420hue and Hunter a’all revealed acceptable predicting abilities for visual color. Multivariate treatment of the data gave best predictions. The absorbance ratio A520/A420has the advantage of being independent of initial pigment content.Keywords
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