Identification of Synthetic Regioisomeric Lutein Esters and Their Quantification in a Commercial Lutein Supplement
摘要:
Synthetic mixtures of 24 mono- and diesters of the asymmetric hydroxylated carotenoid lutein with lauric, myristic, palmitic, and stearic acids were analyzed by liquid chromatography-ultraviolet/visible spectroscopy (LC-UV-vis) and characterized by LC-mass spectrometry (MS) and nuclear magnetic resonance spectroscopy (NMR). These compounds were then used for identifying the composition of a commercial lutein supplement. This is the first report of chromatographic separation of mixed fatty acid lutein diesters. Preferential MS loss of fatty acids or water occurred initially at the 3'-hydroxy position in the epsilon-ionone ring and subsequently at the 3-hydroxy position in the beta-ionone ring. This selective fragmentation leads to facile assignment of the specific fatty acids to the appropriate regioisomeric ionone ring. A commercial lutein supplement contained low levels of two pairs of regioisomeric monoesters and nearly equal levels of three homogeneous diesters and five pairs of mixed diesters. Palmitic acid was the predominant fatty acid, with lower amounts of myristic, stearic, and lauric acids.
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
STABILIZED SOLUBILITY-ENHANCED FORMULATIONS FOR ORAL DELIVERY
申请人:DONG Liang C.
公开号:US20100247632A1
公开(公告)日:2010-09-30
Methods and compositions are described whereby poorly water-soluble beneficial agents such as vitamins and co-factors are formulated into self-emulsifying formulas (SEF) and optionally sorbing the SEF into pores of porous solid particulates, or preparing supersaturated solutions (SSS) and sorbing the SSS into pores of porous solid particulates. These formulations are useful as dosage forms with oral availability.
PROCESS FOR CRYSTALLIZATION OF HIGH PURITY LUTEIN ESTERS FROM MARIGOLD EXTRACTS
申请人:KEMIN INDUSTRIES, INC.
公开号:US20220220059A1
公开(公告)日:2022-07-14
The present invention relates to a novel process for crystallizing high purity lutein and zeaxanthin esters from marigold oleoresin. In another aspect, the present invention relates to the removal of soft and hard waxes by adsorption on diatomaceous earth or other filter aid using acetone or other organic solvent. Another aspect of the present invention relates to achieving high-purity lutein and zeaxanthin esters, including purity levels that are about 90 to 95%.