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Effect of microwave heating on the near infrared spectra and on the prediction accuracy of chemical parameters in red grape homogenates

Citation

Cozzolino, D and Cynkar, WU and Dambergs, RG, Effect of microwave heating on the near infrared spectra and on the prediction accuracy of chemical parameters in red grape homogenates, Sensing and Instrumentation for Food Quality and Safety, 5, (3-4) pp. 97-103. ISSN 1932-7587 (2011) [Refereed Article]

Copyright Statement

Copyright 2011 Springer Science+Business Media, LLC.

DOI: doi:10.1007/s11694-011-9116-6

Abstract

This study reports the effect of microwaving on the chemical composition [pH, total soluble solids (TSS), dry matter (DM) and total anthocyanins extraction], and the visible (VIS) and (NIR) spectra of red grape homogenates. It was observed that microwaving red grape homogenates prior to analysis improved the NIR calibrations for total anthocyanins (SECV: 0.21-0.13 mg g -1) and TSS (SECV: 0.89-0.54 °Brix), however no improvements in the NIR calibrations for DM were observed. Microwaving red grape samples prior to NIR scanning also caused an increased in absorbance for samples heated for up to 3 min, particularly in those wavelengths associated with water (1400 nm and 1930 nm). The practical implication of this study is that microwaving of red grape samples prior to scanning did not improve the NIR calibration statistics for the most common chemical parameters measured in red grapes.

Item Details

Item Type:Refereed Article
Keywords:microwave, near infrared spectroscopy pH, red grapes, total anthocyanins, total soluble solids, two dimensional spectroscopy
Research Division:Engineering
Research Group:Food Sciences
Research Field:Wine Chemistry and Wine Sensory Science
Objective Division:Plant Production and Plant Primary Products
Objective Group:Industrial Crops
Objective Field:Wine Grapes
Author:Dambergs, RG (Dr Robert Dambergs)
ID Code:118358
Year Published:2011
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2017-07-11
Last Modified:2017-11-06
Downloads:0

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