Abstract
Major organic acids (tartaric and malic acids) and major sugars (fructose, glucose, and sucrose) of grape musts were converted to trimethylsilyl (TMS) ethers followed by separation with gas-liquid chromatography. This method provides a rapid, simultaneous determination of these compounds in grape musts. Sample preparation prior to derivization is minimal because of the comparatively low concentration of possible interfering substances in grape must. Multiple peaks were eliminated by producing oximes of the sugars present. Tartaric acid, malic acid, fructose, glucose, and sucrose were all linear in response when measured from 0.5 to 6.0 mg/ mL. Good agreement was found with the ± 3.0% reproducibility reported for use of this method for sugars alone.
- Received August 1981.
- Revision received February 1982.
- Accepted February 1982.
- Published online January 1982
- Copyright 1982 by the American Society for Enology and Viticulture
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