Novel approach to the detection and quantification of phenolic compounds in olive oil based on 31P nuclear magnetic resonance spectroscopy.
31P NMR spectroscopy has been employed to detect and quantify phenolic compounds in the polar fraction of virgin olive oil. This novel analytical method is based on the derivatization of the hydroxyl and carboxyl groups of phenolic compounds with 2-chloro-4,4,5,5-tetramethyldioxaphospholane and the identification of the phosphitylated compounds on the basis of the 31P chemical shifts. Quantification of a large number of phenolic compounds in virgin olive oil can be accomplished by integration of the appropriate signals in the 31P NMR spectrum and the use of the phosphitylated cyclohexanol as internal standard. Finally, the validity of this technique for quantitative measurements was thoroughly examined.
Christophoridou
Stella
S
NMR Laboratory, Department of Chemistry, University of Crete, 714 09 Iraklion, Crete, Greece.
Dais
Photis
P
D005419:Flavonoids / Q000032:analysis*; D009682:Magnetic Resonance Spectroscopy; D000069463:Olive Oil; D010636:Phenols / Q000032:analysis*; D010761:Phosphorus Radioisotopes; D010938:Plant Oils / Q000737:chemistry*; D059808:Polyphenols; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013696:Temperature
D005419:Flavonoids; D000069463:Olive Oil; D010636:Phenols; D010761:Phosphorus Radioisotopes; D010938:Plant Oils; D059808:Polyphenols