Journal of Food and Nutrition Research
ISSN (Print): 2333-1119 ISSN (Online): 2333-1240 Website: http://www.sciepub.com/journal/jfnr Editor-in-chief: Prabhat Kumar Mandal
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Journal of Food and Nutrition Research. 2014, 2(7), 369-376
DOI: 10.12691/jfnr-2-7-7
Open AccessArticle

Screening of Terpene Lactones and Flavonoid Glycosides in gingko biloba Capsule by UPLC- Orbitrap High Resolution MS, with Emphasis on Isomer Differentiation

Haiyun Zhou1, , Weiquan Tang1, Jin Zeng2 and Chengfang Tang1

1Instrumental Analysis and Research Center, Sun Yat-sen University, Guangzhou, China

2Sanya Inspection Service for Quality and Technical Supervision of Hainan Province

Pub. Date: July 09, 2014

Cite this paper:
Haiyun Zhou, Weiquan Tang, Jin Zeng and Chengfang Tang. Screening of Terpene Lactones and Flavonoid Glycosides in gingko biloba Capsule by UPLC- Orbitrap High Resolution MS, with Emphasis on Isomer Differentiation. Journal of Food and Nutrition Research. 2014; 2(7):369-376. doi: 10.12691/jfnr-2-7-7

Abstract

In present study, a method basing on accurate mass and fragmentation pattern was designed to screen the terpene lactones and flavonoids in the methanol extract of Ginkgo biloba capsule powder. An UPLC with a hybrid linear ion trap – orbitrap mass spectrometer (UPLC-LTQ-Orbitrap Elite) was used. The chromatographic analysis of the sample was performed on a C18 column (100 × ID, particle size 1.9 μm) with gradient elution using methanol and water with 0.10% formic acid. Mass spectrometry was performed in the negative ESI mode. By comparison the accurate mass, element composition and fragment pattern, twenty-six compounds were identified, including 5 ginkgo terpene lactones (bilobalide, ginkgolide A, B, C and J) and 21 flavonoid glycosides. The major glycosides identified included: kaempferol-3-O-glu-glu-rha, kaempferol-7-O-rutinoside, isorhamnetin-3-O-rutinoside, kaempferol-3-O -rha-glu, quercetin-3-O- glucoside, kaempferol-3-O-rha-glu-coumaroyl and -methoxymyricetin-3-O-rutinoside. The structural isomers were differentiated through the characteristic ions obtained from their MS/MS spectra. In addition, a compound 3,5,-trihydroxyflavone-3-O-glucoside, which was not reported in G. biloba before to our knowledge, was identified in the extract. The fragmentation pathways and characteristic product ions of flavonoid glycosides were shown and summarized for the rapid identification. The developed method was proved to be useful and precise for fast qualitative analysis of flavonoid compounds in mixture.

Keywords:
gingko biloba terpene lactones gingko biloba glycosides glycoside fragment ions structure characterization UPLC-LTQ-Orbitrap MS

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