Abstract
Abstract A direct, colorimetric method for determining aliphatic aldehydes in alcoholic beverages has been developed. Free acetaldehyde and acetaldehyde bound to bisulfite and to alcohol (acetal) can be determined on separate aliquots. 3-Methyl-2-benzothiazolinone hydrazone hydrochloride reacts with the aldehydes to form a highly colored compound which is measured spectrophotometrically. The average recovery of acetaldehyde added to various wines and distilled liquors was about 98% ; levels of about 30—175 ppm were detected
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