Determination of Selenium inGeochemical Samples by Flow Injection Hydride Generation Inductively Coupled Plasma Atomic Emission Spectrometry Following On-line Removal of Iron Interference by Anion Exchange

Martínez, Luis D.; Saidman, Elbio; Marchevsky, Eduardo Jorge; Olsina, Roberto A.

doi:10.1039/a606884g

Cited by 18 publications

(10 citation statements)

References 14 publications

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“…This was replaced with a conventional Scott type spray chamber. Although they achieved extremely high tolerance levels of the transition metals in selenium hydride generation, the LOD decreased by one order of magnitude with respect to conventional hydride generation techniques [2,3,4,12,13,14] and those of similar type [9].…”

Section: Introductionmentioning

confidence: 79%

“…Strong oxidants, interference of transition and noble metals and other species, including ions of other volatile hydride-forming elements can produce deleterious effects on hydride generation [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,20,21,22,23,24]. It is well known that interferences of transition metals are the most severe and therefore must extensively studied.…”

Section: Plasma Robustnessmentioning

confidence: 99%

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

et al. 2003

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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.

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Section: Introductionmentioning

confidence: 79%

Section: Plasma Robustnessmentioning

confidence: 99%

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

et al. 2003

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“…10 Additionally, various chelating ligands have been used as masking agents, 7,9,11,12,14 amongst other techniques, 15 in an effort to prevent the interfering metals from being reduced. Although separation of the analyte from the matrix prior to hydride generation can resolve the problem, and methods based on ion exchange 16 or coprecipitation 4 have been employed, this requires additional sample preparation. Optimising the generation conditions with special regard to the kinetics of the reaction may be used to minimise suppression effects, since Se is reduced faster than the interfering metals.…”

Section: Introductionmentioning

confidence: 99%

A novel introduction system for hydride generation-inductively coupled plasma mass spectrometry: determination of selenium in biological materials

Moor

Lam

Sturgeon

2000

J. Anal. At. Spectrom.

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Access and use of this website and the material on it are subject to the Terms and Conditions set forth at A novel introduction system for hydride generation-inductively coupled plasma mass spectrometry: determination of selenium in biological materials Moor, C.; Lam, J.; Sturgeon, R.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=8896337&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=8896337&lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1039/a909296jJournal of Analytical Atomic Spectrometry, 15, 2, pp. 143-149, 2000 A novel introduction system for hydride generation-inductively coupled plasma mass spectrometry: determination of selenium in biological materials A novel, robust hydride generation system compatible with sample introduction with inductively coupled plasma mass spectrometry is described and applied to the determination of Se in biological tissues. A short reaction time (60 ms) and a rapid separation of the reaction products is obtained by mixing the acidi®ed sample and the sodium borohydride reductant solution at the tip of a cross-¯ow nebuliser. A modi®ed Scott spray chamber serves as a gas±liquid separator, providing 30 s wash-in and wash-out times. Analytical results generated by external calibration and isotope dilution methodologies agree well with the certi®ed values for Se in certi®ed biological reference materials DORM-2 and DOLT-2. Detection limits for Se and other hydride forming elements, i.e., As, Sn and Sb, are below 10 ng l 21 with typical precision of 2% RSD at the 10 ng ml 21 level. Volatile species o...

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“…Procedures for the simultaneous determination of both inorganic and organic selenium species based on selective retention on anion-exchangers have been devised. 37,38 Offley and co-workers decreased copper interferences in the determination of selenium by HG-AAS by retention of the copper on a strong cation-exchange (SCX) resin, 39 whereas Moyano et al 40 retained copper chlorocomplexes on an anion-exchange resin, and Martinez et al 19 removed the interference by iron in a similar fashion.…”

Section: Introductionmentioning

confidence: 99%

“…These techniques include AFS, [6][7][8][9][10] AAS, [11][12][13] ICP-MS, [14][15][16][17] and ICP-OES. [18][19][20][21][22] According to a recent review by Pohl 23 for the relevant elements, continuous flow HG has been widely used as a sample introduction technique for OES because of the high analyte transport efficiency, and the possibilities for the elimination of spectral interferences since the analyte is separated from the matrix. In the FI mode, there is the additional benefit of increasing sample throughput, though this has not been so widely implemented as most of the current generation of instruments cannot handle timebased transient signals.…”

Section: Introductionmentioning

confidence: 99%

Determination of selenium by flow injection hydride generation inductively coupled plasma optical emission spectrometry

Hernandez

Tyson

Uden

et al. 2007

J. Anal. At. Spectrom.

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Two flow injection hydride generation procedures for the determination of selenium with an inductively coupled plasma emission spectrometer capable of monitoring transient signals were developed. In one, the acidified sample was injected into an acid carrier, which merged downstream with a stream of thiourea (for samples containing significant concentrations of copper) then with a stream of borohydride. In the second, the analyte was preconcentrated by passing the sample through an on-line anion-exchanger, followed by elution of the retained selenium eluted with acid into the HG manifold. A systematic study was made of the effect of radiofrequency power, plasma gas flow, stripping gas flow, sodium borohydride and hydrochloric acid concentrations and flow rates, sample acidity and the lengths of mixing and stripping coils. The hydride was stripped from solution and transported to the plasma by the gas normally delivered to the nebulizer, through a direct connection between the gas-liquid separator and the injector tube. The limits of detection for the first method, which ranged from 0.7 to 0.3 mg l À1 for 200-1000 ml sample volumes, were 10 times lower than those for conventional nebulization. The reproducibility (relative standard deviation of 5 successive measurements) was between 2-5% for 10 mg l À1 -100 mg l À1 Se in 10% HCl. The repeatability, based on five measurements per day performed on three consecutive days, was 4-6% for 10 mg l À1 -100 mg l À1 Se. The overall procedure was validated by the determination of selenium in digests of spinach leaves (SRM 1570a), bovine liver (SRM 1577b) and dogfish muscles (DORM-2). The interference from copper was removed by the addition of thiourea at a confluence point in the FI manifold. In the second method, the detection limit was improved further so that for preconcentration for 2, 4 and 8 min at 8 ml min À1 , the limits of detection were 6, 2 and 0.6 ng l À1 , respectively. Improved tolerance to interfering ions due to the separation of the matrix was found for Cl À , HCO 3 À , SO 4 2À , As(V), Cd(II), Co(II), Cu(II), Fe(III), Ni(II) and Sb(III), although it was found that many of the metallic interfering species were partially retained. The post-column addition of 0.10% (w/v) thiourea improved the tolerance towards Cu(II). Recoveries of selenium from a variety of water samples showed that the resulting procedure was free from interferences.

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Determination of Selenium inGeochemical Samples by Flow Injection Hydride Generation Inductively Coupled Plasma Atomic Emission Spectrometry Following On-line Removal of Iron Interference by Anion Exchange

Cited by 18 publications

References 14 publications

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

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

A novel introduction system for hydride generation-inductively coupled plasma mass spectrometry: determination of selenium in biological materials

Determination of selenium by flow injection hydride generation inductively coupled plasma optical emission spectrometry

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