Optical emission spectrometry with an inductively coupled radiofrequency argon plasma source and sample introduction with a graphite rod electrothermal vaporisation device. Part II. Matrix, inter-element and sample transport effects

Abstract

The effects of some matrix and concomitant elements on the determination of cadmium and arsenic by optical emission spectrometry with an inductively coupled plasma using sample introduction with a graphite rod electrothermal vaporisation device have been investigated. These effects are shown to be caused by variations in pre-vaporisation loss of analyte and analyte transport efficiency to the plasma. Selenium (VI) is shown to effect matrix stabilisation and to improve sample transport efficiency via experiments utilising radio-active cadmium-115m as a tracer.