Determination of ethanol in beverages by flow injection, pervaporation and density measurements

Gonzalez-Rodriguez, Jose and perez juan, pedro and Luque de castro , Maria dolores (2003) Determination of ethanol in beverages by flow injection, pervaporation and density measurements. talanta, 59 (4). pp. 691-696. ISSN 0039-9140

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Determination of ethanol in beverages by flow injection, pervaporation and density measurements
A fast, clean and easy to automate flow injection-pervaporation method for the determination of ethanol in different beverages using density measurements is proposed. The method is based on separation of the ethanol from the sample using a pervaporation module, thus obtaining in the acceptor chamber of the pervaporator a water-alcohol mixture, the density of which is measured. After optimisation by either the univariate or multivariate approach as required, a linear range between 0-40% was established. Then, the assessment of the method versus a reference one was studied in terms of repeatability (0.12% v/v), reproducibility (0.32% v/v), detection limit (0.11% v/v) and traceability. The sample throughput was 15 samples h-1. The method was in agreement with the reference methods used in the European Union.
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Full text URL: http://dx.doi.org/10.1016/S0039-9140(02)00612-4

Abstract

A fast, clean and easy to automate flow injection-pervaporation method for the determination of ethanol in different beverages using density measurements is proposed. The method is based on separation of the ethanol from the sample using a pervaporation module, thus obtaining in the acceptor chamber of the pervaporator a water-alcohol mixture, the density of which is measured. After optimisation by either the univariate or multivariate approach as required, a linear range between 0-40% was established. Then, the assessment of the method versus a reference one was studied in terms of repeatability (0.12% v/v), reproducibility (0.32% v/v), detection limit (0.11% v/v) and traceability. The sample throughput was 15 samples h-1. The method was in agreement with the reference methods used in the European Union.

Item Type:Article
Additional Information:A fast, clean and easy to automate flow injection-pervaporation method for the determination of ethanol in different beverages using density measurements is proposed. The method is based on separation of the ethanol from the sample using a pervaporation module, thus obtaining in the acceptor chamber of the pervaporator a water-alcohol mixture, the density of which is measured. After optimisation by either the univariate or multivariate approach as required, a linear range between 0-40% was established. Then, the assessment of the method versus a reference one was studied in terms of repeatability (0.12% v/v), reproducibility (0.32% v/v), detection limit (0.11% v/v) and traceability. The sample throughput was 15 samples h-1. The method was in agreement with the reference methods used in the European Union.
Keywords:ethanol, wine, spirits, pervaporation, brandy, flow injection, density, refraction index, automation, method validation, chemometry
Subjects:F Physical Sciences > F110 Applied Chemistry
F Physical Sciences > F190 Chemistry not elsewhere classified
F Physical Sciences > F100 Chemistry
F Physical Sciences > F180 Analytical Chemistry
Divisions:College of Science > School of Life Sciences
ID Code:2124
Deposited By: Jose Gonzalez-Rodriguez
Deposited On:06 Jan 2010 14:50
Last Modified:13 Mar 2013 08:34

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