RT Journal Article
SR Electronic
T1 Improved Gas Chromatographic Determination of Acetic Acid in Wines
JF American Journal of Enology and Viticulture
JO Am J Enol Vitic.
FD American Society for Enology and Viticulture
SP 294
OP 297
DO 10.5344/ajev.1980.31.3.294
VO 31
IS 3
A1 Bruno Trombella
A1 Anthony Ribeiro
YR 1980
UL http://www.ajevonline.org/content/31/3/294.abstract
AB An automated gas-liquid chromatographic method for the analysis of acetic acid in wines is described, which minimizes the often encountered difficulties of peak "tailing," broadening, and "ghosting". The method uses a 6' x 2 mm phosphoric acid-treated glass column, packed with 60/80 mesh Carbopack C, modified with 0.3% Carbowax 20M, and 0.1% H3PO4, which is extremely stable to aqueous injections. The accumulation of residues is eliminated by making a dilution of the sample, and using a glass insert in a low dead-volume injector port. Propionic acid is used as an internal standard, and helium carrier gas is saturated with formic acid to improve the chromatography. The method is rapid, accurate, and precise; giving a standard error of ± 0.0012 g acetic acid per 100 mL of wine, at the 0.005 to 0.054 g per 100-mL concentration level.