Document Detail


Rapid analysis of methanol in grape-derived distillation products using near-infrared transmission spectroscopy.
MedLine Citation:
PMID:  12009965     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Robert G Dambergs; Ambrosias Kambouris; I Leigh Francis; Mark Gishen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  50     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2002 May 
Date Detail:
Created Date:  2002-05-15     Completed Date:  2002-07-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3079-84     Citation Subset:  IM    
Affiliation:
The Australian Wine Research Institute, P.O. Box 197, Glen Osmond, SA 5064, Australia. bob.dambergs@awri.com.au
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MeSH Terms
Descriptor/Qualifier:
Calibration
Chromatography, Gas
Ethanol / analysis
Linear Models
Methanol / analysis*
Spectroscopy, Near-Infrared
Vitis / chemistry*
Wine / analysis
Chemical
Reg. No./Substance:
64-17-5/Ethanol; 67-56-1/Methanol

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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