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

Abstract

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.

Determination of selenium and iodine in human thyroids

“…2). This system was coupled to a direct hydride generation nebulizer (DHGN) [8,9] (homemade), and specific selenium detection was achieved with a Thermo Jarrel Ash (Franklin, MA, USA) IRIS HR radial view inductively coupled plasma optical emission spectrometer (ICP-OES).…”

Influence of EDTA, carboxylic acids, amino- and hydroxocarboxylic acids and monosaccharides on the generation of arsines in hydride generation atomic absorption spectrometry

“…Some procedures for stabilization of arsenic species in water also involve EDTA [13,14]. EDTA has also been used as a masking agent to eliminate interferences from transition metals on the determination of arsenic by HGAAS [15][16][17][18][19]. The effect of EDTA on the generation of arsines has not been investigated, probably because of the assumption that arsenic does not form complexes with EDTA.…”

Effect of temperature on direct chemical vapor generation for plasma optical emission spectrometry: An application of programmable temperature spray chamber

“…The major disadvantage of the CVG using systems equipped with a gas/liquid separator is the need of performing a separate run with the aid of a solution nebulization system to determine the other elemental constituents of the sample if necessary. Direct CVG technique is a combination of solution nebulization and chemical vapor generation [11]. In such systems, the analyte reaches the plasma as a stream of liquid aerosol suspended in gas, which also delivers an analyte vapor load.…”