PT  - JOURNAL ARTICLE
AU  - C. W. Nagel
AU  - Y. Glories
TI  - Use of a Modified Dimethylaminocinnamaldehyde Reagent for Analysis of Flavanols
AID  - 10.5344/ajev.1991.42.4.364
DP  - 1991 Jan 01
TA  - American Journal of Enology and Viticulture
PG  - 364--366
VI  - 42
IP  - 4
4099  - http://www.ajevonline.org/content/42/4/364.short
4100  - http://www.ajevonline.org/content/42/4/364.full
SO  - Am J Enol Vitic.1991 Jan 01; 42
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.