title: Variation of zeta-potential with temperature in fused-silica capillaries used for capillary electrophoresis.
abstract: The temperature variation of electroosmotic mobility corrected for the effects of Joule heating (muEOF0) was employed to investigate the variation of the zeta-potential (zeta) with temperature in fused-silica capillaries. Experimentally determined values for zeta increased at 0.39% per degrees C, a rate that is about four to five times smaller than reported previously. Experimentally determined values of zeta were directly proportional to the absolute temperature although values were also influenced slightly by changes to the dielectric constant. It was found that the effective charge density at the inner surface of the capillary was independent of temperature.
authors.affiliation: Australian Centre for Research on Separation Science (ACROSS), School of Chemistry, University of Tasmania, Hobart, Tasmania, Australia.
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Evenhuis
authors.forename: Rosanne M
authors.initials: RM
authors.lastname: Guijt
authors.forename: Miroslav
authors.initials: M
authors.lastname: Macka
authors.forename: Philip J
authors.initials: PJ
authors.lastname: Marriott
authors.forename: Paul R
authors.initials: PR
authors.lastname: Haddad
mesh_terms: D019075:Electrophoresis, Capillary / Q000295:instrumentation / Q000379:methods*; D012822:Silicon Dioxide / Q000737:chemistry*; D013696:Temperature
chemical_list: D012822:Silicon Dioxide