NDLI: Influence of operating conditions on the effects of acids in inductively coupled plasma atomic emission spectrometry

Content Provider	Royal Society of Chemistry (RSC)
Author	Fernández, Alberto Mermet, Jean-Michel Murillo, Miguel Carrión, Nereida
Copyright Year	1994
Abstract	The influence of the operating conditions on interferences from HCl, HNO3 and H2SO4 in inductively coupled plasma atomic emission spectrometry was studied. The acid concentration was in the 0–2 mol l–1 range. It was found that the acid interferences were strongly dependent on the operating conditions. Several different plasma excitation conditions were obtained by modifying the aerosol carrier gas and the intermediate gas flow rates. The test element was vanadium. Plasma diagnostics were performed by measuring the excitation temperature, the electron number density and the ionic-to-atomic line intensity ratio. In each instance, it was found that the excitation temperature was not modified as a function of the acid concentration. For long residence time and efficient energy transfer, the electron number density and the ionic-to-atomic line intensity ratio were not modified. Only a minor depressing effect was observed for ionic lines, which was attributed to the aerosol formation and transport. In contrast, for short residence time and inefficient energy transfer, both the electron number density and the ionic-to-atomic line intensity ratio were depressed. The significant depressing effect for ionic lines was attributed to a change in the excitation conditions. It is, therefore, possible to separate the acid effects originating from the sample introduction system from those originating in the plasma by carefully selecting the operating conditions of the plasma.
Starting Page	217
Ending Page	221
Page Count	5
File Format	PDF
ISSN	02679477
Volume Number	9
Issue Number	3
Journal	Journal of Analytical Atomic Spectrometry
DOI	10.1039/JA9940900217
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Hydrogen chloride Nitric acid Inductively coupled plasma Acid Blood plasma Aerosol Vanadium Plasma diagnostics Excitation temperature Number density
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Analytical Chemistry

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