Evaluation of parameters that affect the 4-dimethylaminocinnamaldehyde assay for flavanols and proanthocyanidins.

Proanthocyanidins are widely distributed in nature and represent the most abundant flavonoids consumed in the diet. Recent attention has been given to these compounds because of their health-promoting properties toward chronic diseases. Because of their large degrees of chemical variation and stereochemistry, isolation/quantification is difficult. The 4… (More)