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- Title
- Quercetin glucoside profiling of fresh onion (Allium cepa) and aged black onion using HPLC-ESI/MS/MS = HPLC-ESI/MS/MS를 이용한 생양파와 흑양파의 퀘세틴 배당체 분석
- Author(s)
- Dong Min Chung; S H Kwon; Y C Chung; Hyo Kon Chun
- Bibliographic Citation
- Korean Journal of Life Sciences, vol. 21, no. 3, pp. 464-467
- Publication Year
- 2011
- Abstract
- Quercetin is a major flavonoid present in onions, which acts as an antioxidant. Quercetin exists both
as a free compound and conjugated with carbohydrates, primarily as glucosides in onion. Aged black
onion was made through a 30 day aging process in which the onions were kept in an environment
of 60oC and high humidity (90% RH). Quercetin and quercetin glucosides were assayed in onion bulbs
before and after the aging process, using high performance liquid chromatography-electrospray ion trap
mass spectrometry (HPLC-ESI/MS/MS). Quercetin mono- and diglucosides were identified in fresh
onion bulbs, whereas quercetin aglycone was the only form present in aged black onion bulbs. These
findings indicate that the quercetin mono- and di-glucosides present in fresh onions undergo complete
deglycosylation during the aging process. Such profiling will provide a rapid method that can be used
to assess changes in the two major quercetin glycosides during the aging process of onion bulbs
- Keyword
- Allium cepaflavonolquercetinquercetin glucosideHPLC-ESI/MS/MS
- ISSN
- I000-0052
- Publisher
- Korea Soc-Assoc-Inst
- DOI
- http://dx.doi.org/10.5352/JLS.2011.21.3.464
- Type
- Article
- Appears in Collections:
- Division of Bio Technology Innovation > SME Support Center > 1. Journal Articles
- Files in This Item:
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