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J Agric Food Chem. 2015 Mar 18;63(10):2639-46. doi: 10.1021/acs.jafc.5b00122. Epub 2015 Mar 5.

Rapid differentiation of commercial juices and blends by using sugar profiles obtained by capillary zone electrophoresis with indirect UV detection.

Author information

1
Department of Analytical Chemistry, University of Valencia, C/ Dr. Moliner Moliner 50, E-46100 Burjassot, Valencia, Spain.

Abstract

A method for the determination of sugars in several fruit juices and nectars by capillary zone electrophoresis with indirect UV-vis detection has been developed. Under optimal conditions, commercial fruit juices and nectars from several fruits were analyzed, and the sugar and cyclamate contents were quantified in less than 6 min. A study for the detection of blends of high-value juices (orange and pineapple) with cheaper alternatives was also developed. For this purpose, different chemometric techniques, based on sugar content ratios, were applied. Linear discriminant analysis showed that fruit juices can be distinguished according to the fruit type, juice blends also being differentiated. Multiple linear regression models were also constructed to predict the adulteration of orange and pineapple juices with grape juice. This simple and reliable methodology provides a rapid analysis of fruit juices of economic importance, which is relevant for quality control purposes in food industries and regulatory agencies.

KEYWORDS:

fruit juice; fruit juice blends; fruit nectar; indirect CZE; linear discriminant analysis; multiple linear regression; sugar

PMID:
25719749
DOI:
10.1021/acs.jafc.5b00122
[Indexed for MEDLINE]

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