【摘 要】
：
Proanthocyanidins were qualitatively and quantitatively identified using hydrolysis and thiolysis assays,NP-HPLC,HPLC-ESI-MS,MALDI-TOF-MS,1H-NMR,and 13C-NMR techniques in different organs of tea plant
【机 构】
：
Key Laboratory of Tea Biochemistry and Biotechnology,Ministry of Education in China,Anhui Agricultur
论文部分内容阅读
Proanthocyanidins were qualitatively and quantitatively identified using hydrolysis and thiolysis assays,NP-HPLC,HPLC-ESI-MS,MALDI-TOF-MS,1H-NMR,and 13C-NMR techniques in different organs of tea plants in this paper.The results showed that although the di-and tri-hydroxyl groups in the B-ring units,cis-and trans-C-2 units,galloylated and nongalloylated units of monomeric and polymeric flavan-3-ols co-existed in leaves,the tri-hydroxyl,cis-and galloylated flavan-3-ols were the main monomeric catechins units,and the(epi)catechin was the main unit of polymeric flavan-3-ols when the degree of polymerization was greater than five.
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