Polymer-bound tetrahydroborate for arsine generation in a flow-injection system

Tesfalidet, Solomon; Irgum, Knut

doi:10.1021/ac00193a015

Cited by 41 publications

(21 citation statements)

References 22 publications

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“…The results reported previously 5,6 for the determination of arsenic were confirmed. Signals were obtained for both As III and As V .…”

Section: Determination Of Arsenicsupporting

confidence: 79%

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Determination of Selenium by Atomic Absorption Spectrometry With Simultaneous Retention of Selenium(IV) and Tetrahydroborate(III) on an Anion-exchange Resin Followed by Flow Injection Hydride Generation From the Solid Phase

Carrero¹,

Tyson²

1997

Analyst

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Selenium(IV) and tetrahydroborate(III) (borohydride) were simultaneously retained on a strong anion-exchange resin in a packed column. Hydrogen selenide was generated by passage of an injected zone of hydrochloric acid with subsequent detection by AAS with quartz tube atomization. The limits of detection, defined as the concentration giving a signal equal to 3s of the blank, were 0.24, 0.15 and 0.12 mg l 21 of Se for 1, 2 and 3 min preconcentration at a sample flow rate of 3 ml min 21 , respectively. The precision of the procedure, expressed as the RSD of 10 successive determinations of 5, 10, and 20 mg l 21 of Se, varied from 0.41 to 1.32, 0.24 to 0.81 and 0.18 to 0.61% for 1, 2 and 3 min preconcentration, respectively. The system was used for the determination of selenium in river, lake and tap water matrices. No appreciable matrix effects were observed and the system was calibrated with aqueous solutions of a pure selenium salt (Na 2 SeO 3 ). The recoveries of spikes (0.5, 2, and 10 mg l 21 of Se) added to the water samples ranged from 96.0 to 102.0, 96.0 to 107.0 and 98.9 to 108% for river, lake and tap water, respectively.

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“…The results reported previously 5,6 for the determination of arsenic were confirmed. Signals were obtained for both As III and As V .…”

Section: Determination Of Arsenicsupporting

confidence: 79%

“…Other forms of borohydride have been used. Borohydride bound to a stationary phase in a column has been used for hydride generation of arsenic 5,6 and selenium. 7,8 However, the only advantage reported over the use of an aqueous solution of BH 4 2 was the suppression of some matrix interferences.…”

mentioning

confidence: 99%

Determination of Selenium by Atomic Absorption Spectrometry With Simultaneous Retention of Selenium(IV) and Tetrahydroborate(III) on an Anion-exchange Resin Followed by Flow Injection Hydride Generation From the Solid Phase

Carrero¹,

Tyson²

1997

Analyst

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“…Solid NaBH 4 or SnCl 2 reagents have also been coated onto other supports to permit larger volume sampling. [25][26][27] . However, such immobilized reductants are not entirely suitable for hydride or cold vapor generation due to their gradual consumption during the analysis process, leading to poor precision.…”

Section: Introductionmentioning

confidence: 99%

Thin film hydride generation: determination of ultra-trace copper by flow injection in situ hydride trapping graphite furnace AAS

Zheng

Sturgeon

Hou

2010

J. Anal. At. Spectrom.

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A novel system which significantly enhances copper hydride generation efficiency was used for the determination of trace copper by coupling a flow injection system to a graphite furnace for in-situ collection of the analyte and subsequent AAS detection. A single device integrated the functions of hydride generator and gas liquid separator.Solutions of the sample, acidified to 1 % formic acid, and tetrahydroborate reductant were merged to yield a thin film wetting a reaction surface from which product vapor was efficiently liberated and transported to the heated furnace. Optimum operating conditions provided for a generation / transport / collection efficiency of 8-12%. Interferences from common transition and noble metals were effectively eliminated. A limit of detection of 60 pg ml -1 was obtained based on processing a 5 mL sample volume with a precision of better than 4% (RSD) at 1 ng mL -1 . The methodology was successfully applied to the determination of Cu in several NRCC natural w ater and biological tissue Certified Reference Materials.3

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Section: Introductionmentioning

confidence: 99%

Versatile Thin-Film Reactor for Photochemical Vapor Generation

et al. 2010

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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 Versatile thin-film reactor for photochemical vapor generation Zheng, Chengbin; Sturgeon, Ralph E.; Brophy, Christine; Hou, Xiandeng 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=16335085&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=16335085&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/10.1021/ac100229kAnalytical Chemistry, 82, 7, pp. 3086-3093, 2010-03- ABSTRACTA novel system which significantly enhances copper hydride generation efficiency was used for the determination of trace copper by coupling a flow injection system to a graphite furnace for in-situ collection of the analyte and subsequent AAS detection. A single device integrated the functions of hydride generator and gas liquid separator.Solutions of the sample, acidified to 1 % formic acid, and tetrahydroborate reductant were merged to yield a thin film wetting a reaction surface from which product vapor was efficiently liberated and transported to the heated furnace. Optimum operating conditions provided for a generation / transport / collection efficiency of 8-12%. Interferences from common transition and noble metals were effectively eliminated. A limit of detection of 60 pg ml -1 was obtained based on processing a 5 mL sample volume with a precision of better than 4% (RSD) at 1 ng mL -1 . The methodology was successfully applied to the determination of Cu in several NRCC natural w ater and biological tissue Certified Reference Materials.3

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Polymer-bound tetrahydroborate for arsine generation in a flow-injection system

Cited by 41 publications

References 22 publications

Determination of Selenium by Atomic Absorption Spectrometry With Simultaneous Retention of Selenium(IV) and Tetrahydroborate(III) on an Anion-exchange Resin Followed by Flow Injection Hydride Generation From the Solid Phase

Determination of Selenium by Atomic Absorption Spectrometry With Simultaneous Retention of Selenium(IV) and Tetrahydroborate(III) on an Anion-exchange Resin Followed by Flow Injection Hydride Generation From the Solid Phase

Thin film hydride generation: determination of ultra-trace copper by flow injection in situ hydride trapping graphite furnace AAS

Versatile Thin-Film Reactor for Photochemical Vapor Generation

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