Multichannel coulometric detection coupled with liquid chromatography for determination of phenolic esters in honey.
A method for the determination of phenolic esters in different varieties of honey was developed. The substances were separated by RP-HPLC. A coulometric electrode-array system with sixteen electrodes arranged in series and set at increasing potentials (300-900 mV) was used for electrochemical detection of the compounds. Chromatographic peaks for methyl 4-hydroxybenzoate, methyl vanillate, methyl syringate, trans-p-methyl coumarate and trans-methyl ferulate were identified. The content of the esters varied between 1.3 and 5044 micrograms per kg of honey with detection limits of 0.1-1.0 microgram per kg of honey (S/N = 3). The method described is a sensitive assay to differentiate between rape honey and other varieties.
Institute for Analytical Chemistry, University of Vienna, Austria.
E
E
Joerg
G
G
Sontag
D002851:Chromatography, High Pressure Liquid; D004563:Electrochemistry; D004566:Electrodes; D006722:Honey / Q000032:analysis*; D007536:Isomerism; D010636:Phenols / Q000032:analysis*
D010636:Phenols