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Rapid analysis of methanol in grape derived distillation products using near infrared transmission spectroscopy


Dambergs, RG and Kambouris, A and Francis, IL and Gishen, M, Rapid analysis of methanol in grape derived distillation products using near infrared transmission spectroscopy, Journal of Agricultural and Food Chemistry, 50 pp. 3079-3084. ISSN 0021-8561 (2002) [Refereed Article]

DOI: doi:10.1021/jf011089a


Samples of distillates derived from the production of wine-fortifying spirit were analyzed for methanol by gas chromatography (GC) and near-infrared spectroscopy (NIRS). NIRS calibration models were developed which could accurately predict methanol concentrations in samples of fortifying spirit that had been produced over a period of three years from four different commercial distillation facilities. The best accuracy of the predictive models, as measured by the standard error of prediction value, was 0.06 g/L methanol. Other distillation fractions, produced during preparation of commercial fortifying spirit, were also examined. The most useful NIRS calibration models used partial least squares regression on continuous spectra from a scanning instrument, but it was demonstrated that calibrations could also be developed with a smaller number of fixed wavelengths, using multiple linear regression models. NIRS offers the advantages of rapid analysis, with simple routine operation, and may offer the potential for in-line process control in the operation of a commercial distillation facility.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Horticultural production
Research Field:Oenology and viticulture
Objective Division:Plant Production and Plant Primary Products
Objective Group:Industrial crops
Objective Field:Wine grapes
UTAS Author:Dambergs, RG (Dr Robert Dambergs)
ID Code:81394
Year Published:2002
Web of Science® Times Cited:65
Deposited By:Agricultural Science
Deposited On:2012-12-04
Last Modified:2012-12-04

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