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Am. J. Enol. Vitic. 41:4:289-294 (1990)
Copyright © 1990 by the American Society for Enology and Viticulture.
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Determination of Major Carboxylic Acids in Wine by an Optimized HPLC Method with Linear Gradient Elution

R. M. Marcé 1, M. Calull 1, F. Borrull 1, and F. X. Rius 1

1 Dep. Quimica, Universitat de Barcelona, Imperial Tarraco 1, 43005 Tarragona (Spain).

An optimized method to determine carboxylic acids in wine based on pre-column derivatization with phenacyl bromide is reported. The determination of the different acids has been carried out using a linear gradient elution involving water and methanol. The method has been optimized by the Simplex method using a modification of CRF (chromatographic response factor) as the criterion for selectivity optimization. After validation, the method was applied to determine carboxylic acids in red and white wines and grape must of the Tarragona region.

Key words: carboxylic acids, wine, optimization, simplex method, linear gradient

Submitted on November 13, 1989






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Copyright © 1990 by the American Society for Enology and Viticulture.