A CZE method for the separation and quantitation of phenolic acids (cinnamic, syringic, p-coumaric, vanillic, caffeic, 3,4-dihydroxyphenylacetic, protocatechuic), extracted from extra virgin olive oil, was developed. The sample preparation involved the LLE and SPE extraction methods. CE separation was performed in a fused silica capillary of I.D.= 50μm using as a BGE 40 mM borate buffer at pH=9.2. The separation voltage was 18kV with corresponding current of 27-28 μA. Detection was accomplished with UV-detector at λ=200nm. The proposed method was fully validated. A good repeatability of migration time (RSD% ranged from 0.81 to 1.63) and of corrected peak area ( RSD% from 2.89 to 5.77) was obtained. The linearity of detector response in the range from 5 to 50 ppm was checked, obtaining the correlation coefficient R2 values in the range: 0.9919- 0.9997. Some phenolic acids in real oil samples were detected and quantified with the proposed method.
Determination of phenolic acids in olive oil by capillary electrophoresis
RUSSO, Mario Vincenzo
2004-01-01
Abstract
A CZE method for the separation and quantitation of phenolic acids (cinnamic, syringic, p-coumaric, vanillic, caffeic, 3,4-dihydroxyphenylacetic, protocatechuic), extracted from extra virgin olive oil, was developed. The sample preparation involved the LLE and SPE extraction methods. CE separation was performed in a fused silica capillary of I.D.= 50μm using as a BGE 40 mM borate buffer at pH=9.2. The separation voltage was 18kV with corresponding current of 27-28 μA. Detection was accomplished with UV-detector at λ=200nm. The proposed method was fully validated. A good repeatability of migration time (RSD% ranged from 0.81 to 1.63) and of corrected peak area ( RSD% from 2.89 to 5.77) was obtained. The linearity of detector response in the range from 5 to 50 ppm was checked, obtaining the correlation coefficient R2 values in the range: 0.9919- 0.9997. Some phenolic acids in real oil samples were detected and quantified with the proposed method.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
