title: Influence of graphite furnace tube design on vapour temperatures and chemical interferences in ETA-AAS.
abstract: A two-line atomic absorption method for determination of lead was used for calculation of the temperatures experienced by analyte atoms in the gas phase after wall atomization with modified Philips SP-9 graphite tubes. For each tube, the influence of the temperature gradient on the vapour phase temperature and chemical interferences experienced by Cd, Mn and Pb in ETA-AAS was investigated. A higher vapour temperature and lower chemical interference by chlorides were observed when the tube temperature gradient was reversed through a reduction in the wall thickness towards the ends of the tube.
authors.affiliation: Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, Scotland.
authors.forename: O O
authors.initials: OO
authors.lastname: Ajayi
authors.forename: D
authors.initials: D
authors.lastname: Littlejohn
authors.forename: C B
authors.initials: CB
authors.lastname: Boss