title: The use of matrix-specific calibrations for oxygen in analytical glow discharge spectrometry.
abstract: The performance of glow discharge optical emission spectroscopy and mass spectrometry for oxygen determination is investigated using a set of new conductive samples containing oxygen in the percent range in three different matrices (Al, Mg, and Cu) prepared by a sintering process. The sputtering rate corrected calibrations obtained at standard conditions for the 4 mm anode (700 V, 20 mA) in GD-OES are matrix independent for Mg and Al but not for Cu. The importance of a "blue shifted" line of oxygen at 130.22 nm (first reported by Köster) for quantitative analyses by GD-OES is confirmed. Matrix-specific calibrations for oxygen in GD-MS are presented. Two source concepts-fast flow (ELEMENT GD) and low gas flow (VG9000)-are evaluated obtaining higher sensitivity with the static flow source. Additional experiments using Ar-He mixtures or μs pulsed GD are carried out in ELEMENT GD aiming to improve the oxygen sensitivity.
authors.affiliation: Leibniz Institute for Solid State and Materials Research (IFW) Dresden, P.O. Box 270116, 01171, Dresden, Germany.
authors.forename: Cristina
authors.initials: C
authors.lastname: Gonzalez-Gago
authors.forename: Petr
authors.initials: P
authors.lastname: Smid
authors.forename: Thomas
authors.initials: T
authors.lastname: Hofmann
authors.forename: Cornel
authors.initials: C
authors.lastname: Venzago
authors.forename: Volker
authors.initials: V
authors.lastname: Hoffmann
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Gruner