title: Sol-gel carbon composite electrode as an amperometric detector for liquid chromatography.
abstract: The performance characteristics of an electrochemical detector for liquid chromatography based on a sol-gel carbon composite working electrode in a wall-jet configuration are described. The new detector combines the versatility of sol-gel processes with several favorable characteristics, including fast electron-transfer kinetics, mechanical rigidity and renewability. Factors influencing the amperometric response are explored and optimized. Detection limits of 58-170 pg are reported for various neurotransmitters. Repetitive injections yield peak heights with relative standard deviations of 2.6-3.7%. The prospects of using sol-gel derived electrochemical detectors are discussed.
authors.affiliation: Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM 8803, USA.
authors.forename: P V
authors.initials: PV
authors.lastname: Pamidi
authors.forename: C
authors.initials: C
authors.lastname: Parrado
authors.forename: S A
authors.initials: SA
authors.lastname: Kane
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.forename: M R
authors.initials: MR
authors.lastname: Smyth
authors.forename: J
authors.initials: J
authors.lastname: Pingarrón