RT Journal Article
SR Electronic
T1 Use of a Modified Dimethylaminocinnamaldehyde Reagent for Analysis of Flavanols
JF American Journal of Enology and Viticulture
JO Am J Enol Vitic.
FD American Society for Enology and Viticulture
SP 364
OP 366
DO 10.5344/ajev.1991.42.4.364
VO 42
IS 4
A1 C. W. Nagel
A1 Y. Glories
YR 1991
UL http://www.ajevonline.org/content/42/4/364.abstract
AB The acid concentration in the dimethylaminocinnamaldehyde (DC) reagent was reduced in order to give slower color development which allowed for more accurate assay of flavanols. The effect of water content in the sample on rate and total color development was shown. The method was used for estimation of degree of polymerization (DP) of isolated flavanols and flavanols in commercial wines of different ages. The apparent DP did not vary according to age of red wine except the youngest wine gave the lowest values. The ratio of flavonoids to DC values ranged from 3.24 to 3.89.