Rapid Analysis of Methanol in Grape-Derived Distillation Products Using Near-Infrared Transmission Spectroscopy
| Autor: | Mark Gishen, I.L. Francis, A. Kambouris, Robert G. Dambergs |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Chromatography
Gas Spectroscopy Near-Infrared Ethanol Methanol Near-infrared spectroscopy Analytical chemistry Wine General Chemistry law.invention chemistry.chemical_compound chemistry law Calibration Linear regression Partial least squares regression Linear Models Vitis Gas chromatography General Agricultural and Biological Sciences Spectroscopy Distillation |
| Zdroj: | Journal of Agricultural and Food Chemistry. 50:3079-3084 |
| ISSN: | 1520-5118 0021-8561 |
| DOI: | 10.1021/jf011089a |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|