Identification and Quantification of Zeaxanthin Esters in Plants Using Liquid Chromatography−Mass Spectrometry
作者:Philipp Weller、Dietmar E. Breithaupt
DOI:10.1021/jf034803s
日期:2003.11.1
It has been suggested that lutein and zeaxanthin may decrease the risk for age-related macular degeneration. Surprisingly, oleoresins rich in zeaxanthin are not yet available on the market. Several authors have reported enhanced stability of esterified xanthophylls, so plants containing zeaxanthin esters were investigated to establish valuable sources for the production of durable oleoresins. Liquid chromatography-atmospheric pressure chemical ionization mass spectrometry [LC-(APCI)MS] was used to unequivocally identify zeaxanthin esters of a standard mixture and in several plant extracts. Zeaxanthin esters were quantified on the basis of their respective molecular masses using zeaxanthin for calibration; total zeaxanthin was determined after saponification of aliquots of the extracts. Thus, dried wolfberries (Lycium barbarum), Chinese lanterns (Physalis alkekengi), orange pepper (Capsicum annuum), and sea buckthorn (Hippophae rhamnoides) proved to be valuable zeaxanthin ester sources. The present LC-MS method allows for an even more detailed analysis of zeaxanthin esters than reported previously.
TRANS-XANTHOPHYLL ESTER CONCENTRATES OF ENHANCED PURITY AND METHODS OF MAKING SAME
申请人:Inexa Industria Extractora C.A.
公开号:EP1073694A1
公开(公告)日:2001-02-07
WATER DISPERSIBLE COMPOSITION AND METHOD FOR PREPARING SAME
申请人:Nestec S.A.
公开号:EP1983847A1
公开(公告)日:2008-10-29
POLYHYDROXYLATED PENTACYCLIC TRITERPENE ACIDS AS HMG-COA REDUCTASE INHIBITORS
申请人:Hans, Joachim
公开号:EP2812005A1
公开(公告)日:2014-12-17
Water Dispersible Composition and Method for Preparing Same
申请人:Wang Junkuan
公开号:US20080254153A1
公开(公告)日:2008-10-16
The invention pertains to a water dispersible, preferably a powder composition of water extractible bioactive components of exclusively fruit or vegetable or plant origin. These components are obtainable by: a) subjecting a selected fruit or vegetable or plant material to homogenisation in weak alkaline conditions and at moderate temperature; b) separating the liquid extract from the homogenised mass and subsequently bringing it to neutrality; and c) eventually concentrating or drying, preferably by freeze drying, the neutralized liquid extract. The composition can be used as primary composition in the preparation of a food product for oral administration, a food supplement, a pet food product, a pet food supplement, a cosmetic preparation or a pharmaceutical preparation.