PT - JOURNAL ARTICLE AU - L. P. McCloskey AU - P. Mahaney TI - An Enzymatic Assay for Acetaldehyde in Grape Juice and Wine AID - 10.5344/ajev.1981.32.2.159 DP - 1981 Jan 01 TA - American Journal of Enology and Viticulture PG - 159--162 VI - 32 IP - 2 4099 - http://www.ajevonline.org/content/32/2/159.short 4100 - http://www.ajevonline.org/content/32/2/159.full SO - Am J Enol Vitic.1981 Jan 01; 32 AB - A rapid enzymatic method for the determination of acetaldehyde in juice and wine is presented. The assay measures both acetaldehyde and the bisulfite addition product, l-hydroxyethane sulfonic acid. The assay utilizes one enzyme and NADH. This assay essentially recovers 100% of the acetaldehyde and the statistical data are good. The standard deviation was less than 1 ppm at a mean of 120 ppm. The assay was applied to both red and white wines and any interferences due to red wine phenolics was overcome with PVP. When applied to table wines, the assay showed an average of 83 ppm for reds and 32 ppm for whites.