[Analysis of the isomers of dihydroxybenzenes by micellar electrokinetic capillary chromatography with on-column amperometric detection at carbon-fiber microelectrode].
The effects of the concentrations of beta-cyclodextrin(CD) in electrolyte on the cyclic voltammetric properties of o-, m-, p-dihydroxybenzenes at carbon-fiber microelectrode were studied. The inclusion between o-, m-, p-dihydroxybenzenes and beta-CD was investigated based on the molecular structures and experimental results. The study showed that the order of the inclusion interaction, from strong to weak, between dihydroxybenzenes and beta-CD, was m-, o- and p-dihydroxybenzenes. The effects of the concentrations of NH4Cl, SDS and beta-CD, and the pH values of the electrophoretic buffer on the migration time of o, m, p-dihydroxybenzenes were investigated. The assay of o, m, p-dihydroxybenzenes by micellar electrokinetic capillary chromatography with on-column amperometric detection at carbon-fiber microelectrode was developed. The recovery ranged from 98% to 103%.
Zhang
S
S
Department of Chemistry, Graduate School, University of Science and Technology of China, Beijing, 100039.
Liang
L
L
Yuan
Z
Z
D002244:Carbon; D000077482:Carbon Fiber; D002396:Catechols / Q000032:analysis; D020374:Chromatography, Micellar Electrokinetic Capillary; D003505:Cyclodextrins; D006873:Hydroquinones / Q000032:analysis*; D008839:Microelectrodes; D012118:Resorcinols / Q000032:analysis*; D047392:beta-Cyclodextrins
D000077482:Carbon Fiber; D002396:Catechols; D003505:Cyclodextrins; D006873:Hydroquinones; D012118:Resorcinols; D047392:beta-Cyclodextrins; D002244:Carbon; C031215:betadex