Rapid preparation of procyanidins B2 and C1 from Granny Smith apples by using low pressure column chromatography and identification of their oligomeric procyanidins.
Research in the field of procyanidins is always hindered by the lack of procyanidin standards, and the preparation of procyanidins, especially in large scale, remains difficult and time-consuming. Commercial sources of procyanidin standards are scarce. In this study, a rapid preparation method of procyanidins by using low-pressure column chromatography was developed. Procyanidins in Granny Smith apples were extracted with boiled water and purified on an ADS-17 macroporous resin column to obtain a Granny Smith apple procyanidin extract (GSE). GSE was fractionated according to its degree of polymerization on a Toyopearl TSK HW-40s column. Procyanidins B2 (epicatechin-(4beta-8)-epicatechin) and C1 (epicatechin-(4beta-8)-epicatechin-(4beta-8)-epicatechin) were prepared without HPLC separation. Oligomeric procyanidins from Granny Smith apples were also identified by liquid chromatography-electrospray ionization-mass spectrometry.
Xiao
Jun-Song
JS
College of Food Science and Technology, Huazhong Agricultural University, Wuhan, PR China.
Liu
Liang
L
Wu
Hua
H
Xie
Bi-Jun
BJ
Yang
Er-Ning
EN
Sun
Zhi-Da
ZD
D044946:Biflavonoids / Q000302:isolation & purification*; D002392:Catechin / Q000302:isolation & purification*; D002845:Chromatography / Q000379:methods; D002853:Chromatography, Liquid; D005638:Fruit / Q000737:chemistry*; D027845:Malus / Q000737:chemistry*; D044945:Proanthocyanidins / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization
D044946:Biflavonoids; D044945:Proanthocyanidins; C479580:procyanidin B2; C479583:procyanidin C; D002392:Catechin