EVALUATION OF A MICROCONCENTRIC NEBULIZER-CYCLONIC SPRAY CHAMBER FOR FLOW-INJECTION SIMULTANEOUS MULTIELEMENT INDUCTIVELY-COUPLED PLASMA OPTICAL-EMISSION SPECTROMETRY

Merits of a micro concentric nebuliser and a cyclonic spray chamber fo r sample introduction to simultaneous multielement inductively coupled plasma optical emission spectrometry (ICP-OES) were evaluated. Sample delivery was both continuous and by flow injection (FI), All signal p rofiles were acquired and processed in the time-resolved mode. At solv ent how rates of 0.1 and 1.0 ml min(-1), solvent transport efficiency to the ICP is about 90 and 50%, respectively, As a consequence, improv ements in detection limits were observed compared with those using a c onventional concentric nebuliser. Application of Sc as an internal sta ndard to improve precision with FI sample delivery was also studied.