期刊
FOOD RESEARCH INTERNATIONAL
卷 78, 期 -, 页码 410-423出版社
ELSEVIER
DOI: 10.1016/j.foodres.2015.09.001
关键词
Mango juice; Kinetics; Fingerprinting; Shelf-life; Targeted quality parameters; Volatiles
资金
- Seventh Framework Programme (FP7) of the European Union under the Marie Curie Initial Training Network 'HST FoodTrain' [264470]
- Research Foundation Flanders (FWO)
- KU Leuven
The present work shows the potential of the integrated fingerprinting-kinetics approach in evaluating shelf-life changes of pasteurised mango juice (cv. 'Totapuri'). Seven mango juice formulations (i.e. control (mango puree and water), ascorbic acid-enriched (AA(250) and AA(500)), citric acid-enriched (CA, CA + AA(250) and CA + AA(500)) and sugar-enriched (S) samples) were pasteurised and stored at 42 degrees C for 8 weeks. In this part, the kinetics of the shelf-life markers selected from the multivariate fingerprinting approach was modelled. Changes in selected targeted parameters could be best described by a zero-order (colour values, degrees Brix, furfural, HMF), a first-order (ascorbic acid), a fractional conversion (fructose, glucose, oxygen) and a second-order model (sucrose). Differences in the rate constant were observed, with faster ascorbic acid degradation and furfural formation in AA-enriched samples and faster hydrolysis of sugars and HMF formation in CA-enriched samples compared to control samples. To describe changes in selected volatiles (terpenes, sulphur compounds, acids, ketones and esters), different kinetic models were selected. Two trends were observed: changes as affected by different mango juice formulations (e.g., faster reaction in CA-enriched samples or in a lower pH condition) and changes irrespective of the formulations. Referring to the literature, in general, acid-catalysed reactions, ascorbic acid degradation and oxidation reactions are the main reactions responsible for the observed quality changes in stored mango juice. (C) 2015 Elsevier Ltd. All rights reserved.
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