| Simultaneous determination of phenolic compounds and triterpenic acids in oregano growing wild in Greece by (31) P NMR spectroscopy. | |
| | |
MedLine Citation:
|
PMID: 23001915 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
(31) P nuclear magnetic resonance (NMR) spectroscopy was used to detect and quantify simultaneously a large number of phenolic compounds and the two triterpenic acids, ursolic acid and oleanolic acid, extracted from two oregano species Origanum onites and Origanum vulgare ssp. Hirtum using two different organic solvents ethanol and ethyl acetate. This analytical method is based on the derivatization of the hydroxyl and carboxyl groups of these compounds with the phosphorous reagent 2-chloro-4,4,5,5-tetramethyl-1,3,2-dioxa phospholane and the identification of the phosphitylated compounds on the basis of the (31) P chemical shifts. Unambiguous assignment of the (31) P NMR chemical shifts of the dihydroxy- and polyhydroxy-phenols in oregano species as well as those of the triterpenic acids was achieved upon comparison with the chemical shifts of model compounds assigned by using two-dimensional NMR techniques. Furthermore, the integration of the appropriate signals of the hydroxyl derivatives in the corresponding (31) P NMR spectra and the use of the phosphitylated cyclohexanol as an internal standard allowed the quantification of these compounds. The validity of this technique for quantitative measurements was thoroughly examined. Copyright © 2012 John Wiley & Sons, Ltd. |
| | |
Authors:
|
Alexia Agiomyrgianaki; Photis Dais |
Related Documents
:
|
12651735 - Domcut: prediction of inter-domain linker regions in amino acid sequences. 9224655 - Alternative splicing of clc-6 (a member of the cic chloride-channel family) transcripts... 12913315 - Identification of the lantibiotic nisin q, a new natural nisin variant produced by lact... 10737185 - 1-aminocyclopropane-1-carboxylate (acc) deaminase induced by acc synthesized and accumu... 6370995 - The biosynthesis of gram-negative endotoxin. formation of lipid a disaccharides from mo... 11909255 - Lattice boltzmann simulation of chemical dissolution in porous media. |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2012-9-23 |
Journal Detail:
|
Title: Magnetic resonance in chemistry : MRC Volume: - ISSN: 1097-458X ISO Abbreviation: Magn Reson Chem Publication Date: 2012 Sep |
Date Detail:
|
Created Date: 2012-9-24 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9882600 Medline TA: Magn Reson Chem Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
Copyright © 2012 John Wiley & Sons, Ltd. |
Affiliation:
|
NMR Laboratory, Department of Chemistry, University of Crete, Voutes Campus, 71003 Hraklion, Crete, Greece. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Effects of bleaching agents and Tooth Mousse(™) on human enamel hardness.
Next Document: Conceptual underestimation of the total body clearance by the sum of clearances of individual organs...