Investigation of the direct hydride generation nebulizer for the determination of arsenic, antimony and selenium in inductively coupled plasma optical emission spectrometry

A direct hydride generation nebulizer (DHGN) was explored for introduction of the sample in inductively coupled plasma-optical emission spectrometry (ICP-OES) using radially viewed mode. This simple hydride generation system was constructed in our laboratory and requires similar plasma operating con...

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Bibliographic Details
Published in:Analytical and bioanalytical chemistry 2003-05, Vol.376 (1), p.110-117
Main Authors: Rojas, Illiana, Murillo, Miguel, Carrión, Nereida, Chirinos, José
Format: Article
Language:English
Subjects:
Animals
Antimony - analysis
Arsenic - analysis
Boranes - chemistry
Nebulizers and Vaporizers
Ostreidae - chemistry
Reference Standards
Reproducibility of Results
Selenium - analysis
Sensitivity and Specificity
Solutions - chemistry
Spectrum Analysis - instrumentation
Spectrum Analysis - methods
Ultrasonics
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Summary:A direct hydride generation nebulizer (DHGN) was explored for introduction of the sample in inductively coupled plasma-optical emission spectrometry (ICP-OES) using radially viewed mode. This simple hydride generation system was constructed in our laboratory and requires similar plasma operating conditions to conventional nebulizer-spray-chamber arrangements. This work was focused on the optimization of the operating conditions for hydride generation and evaluation of the main analytical figures of merit for the determination of As, Sb and Se. The excitation conditions of the ICP-OES instrument operated with the DHGN were also explored. Results showed that the analytical performance of the new system for the determination of As, Sb and Se was superior to that of conventional nebulization systems. The DHGN also enabled the determination of elements that do not form volatile hydrides, but with less sensitivity than conventional nebulization systems. Evaluation of the plasma robustness showed that gases generated in hydride generation do not significantly affects the plasma discharge. Similar to conventional hydride generation techniques, analysis with DHGN was susceptible to non-spectroscopic interferences produced by transition metals. Finally, the utility of the DHGN in practical ICP-OES studies was demonstrated in the determination of trace elements in an oyster tissue standard reference material.
ISSN:1618-2642
DOI:10.1007/s00216-003-1856-7