PT  - JOURNAL ARTICLE
AU  - Bruno Trombella
AU  - Anthony Ribeiro
TI  - Improved Gas Chromatographic Determination of Acetic Acid in Wines
AID  - 10.5344/ajev.1980.31.3.294
DP  - 1980 Jan 01
TA  - American Journal of Enology and Viticulture
PG  - 294--297
VI  - 31
IP  - 3
4099  - http://www.ajevonline.org/content/31/3/294.short
4100  - http://www.ajevonline.org/content/31/3/294.full
SO  - Am J Enol Vitic.1980 Jan 01; 31
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.