title: Improvement of analyte to interferent line intensity ratio in direct current glow discharge mass spectrometry.
abstract: Elemental analysis by quadrupole mass spectrometry with direct current powered glow discharge ion source has been improved for flat Cu samples. The line ratio of analyte to Ar-related interferents can be enhanced for several orders of magnitude when ion source geometry, ion extraction system and operating parameters are optimised quasi-simultaneously. Such an extreme improvement may partially be explained by different ion energy distributions depending on their origin: matrix and analytes, working gas, residual gases. Probably it is due to a synergistic effect of several processes needing further investigation.
authors.affiliation: N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninsky Prospekt, GSP-1, 117 907, Moscow, Russia.
authors.forename: K G
authors.initials: KG
authors.lastname: Oksenoid
authors.forename: V
authors.initials: V
authors.lastname: Liebich
authors.forename: G
authors.initials: G
authors.lastname: Pietzsch