title: A comparison of different types of gold-carbon composite electrode for detection of arsenic(III).
abstract: A study has been conducted using abrasively modified basal and edge-plane graphite, carbon-paste, and carbon-epoxy electrodes to create gold-carbon composite electrodes. Using either nano or micro-sized gold particles their suitability for use in detecting arsenic(III) is assessed. It was found that gold arrays prepared from micron-sized particles gave the best performance for arsenic detection. In particular micron arrays produced in carbon-paste electrodes with an easily renewable surface work well for detection of arsenic, producing a detection limit of 5(+/-2)x10(-9) mol L(-1), with a high sensitivity of 10(+/-0.1) A mol(-1) L.
authors.affiliation: Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX13QZ UK.
authors.forename: Andrew O
authors.initials: AO
authors.lastname: Simm
authors.forename: Craig E
authors.initials: CE
authors.lastname: Banks
authors.forename: Shelley J
authors.initials: SJ
authors.lastname: Wilkins
authors.forename: Nikos G
authors.initials: NG
authors.lastname: Karousos
authors.forename: James
authors.initials: J
authors.lastname: Davis
authors.forename: Richard G
authors.initials: RG
authors.lastname: Compton