title: Analytical characterisation of a capacitively coupled plasma torch with a central tube electrode.
abstract: A new type of radiofrequency capacitively coupled plasma torch is presented. The torch electrode geometry is coaxial with a tubular central electrode and one or two outer ring electrodes. The argon plasma is generated at 275 W radiofrequency power and 27.12 MHz and it has a very good stability and a low gas consumption of 0.4 l min(-1). The nebulized sample is introduced through the tubular electrode into the core of the annular shaped plasma thus achieving a better atomisation and a lower background. The limits of detection for 20 elements are in the range of ng ml(-1) and the dynamic range between 2.5 and 3.5. The best results are obtained with the torch with two outer ring electrodes.
authors.affiliation: University of Cluj, Department of Chemistry, 3400 Cluj-Napoca, Romania.
authors.forename: E A
authors.initials: EA
authors.lastname: Cordos
authors.forename: T
authors.initials: T
authors.lastname: Frentiu
authors.forename: A M
authors.initials: AM
authors.lastname: Rusu
authors.forename: S D
authors.initials: SD
authors.lastname: Angel
authors.forename: A
authors.initials: A
authors.lastname: Fodor
authors.forename: M
authors.initials: M
authors.lastname: Ponta