Catechin is not only the main component of monomeric phenols in the grape seed polyphenols,but also the important material constituting proanthocyanidin.

• 儿茶素是葡萄籽多酚中单体的主要成分,又是构成原花青素的主要单体,福林肖卡法测定多酚时采用儿茶素作为对照物来表征葡萄籽多酚含量更准确。