Determination of zinc in food using atomic fluorescence spectrometry by hydride generation from organized media

Sun, Hanwen; Suo, Ran; Lü, Yunkai

doi:10.1016/s0003-2670(02)00053-3

Cited by 61 publications

(51 citation statements)

References 22 publications

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“…With the conditioned system, the CVG system was thoroughly cleaned first using 6 M HNO 3 and then CVG of 6 blank/standard cycles (5 ml each) was performed and signal intensity data recorded. The CVG was then disconnected from the plasma torch and, without stopping the pump, a filter was attached and CVG from a 10 ml solution of 1 mg l 21 Ag and 1m gl 21 Mg, followed by 5 ml of blank, was performed and the waste liquid collected.…”

Section: Procedures Trapped and Residual Ag Determinationmentioning

confidence: 99%

“…After cleaning the CVG system with 6 M HNO 3 , it took at least 5 sample/blank cycles to achieve stable sensitivity with Ag, compared with only 1-2 cycles for selenium. The sensitivity obtained in the first cycle may be even less than 50% of the stable signal.…”

Section: Sensitivity Drift and Memory Effectsmentioning

confidence: 99%

“…Volatile metal species are reportedly considered to be unstable species, 3,5,7,11 but reports on actual transport losses differ to a great extent. Less than 10% losses were reported for Ag using a 30 cm transfer line, 8 as well as a 7.8-fold signal decrease when doubling the transfer line length to 46.8 cm.…”

Section: Transport and Trapping Of Volatile Ag Speciesmentioning

confidence: 99%

“…[2][3][4][5][6][7][8][9][10][11][12][13][14] The production of volatile species (chemical vapour generation, CVG) of Ti, Cr, Mn, Fe, Co, Ni, Cu, Zn, Rh, Pd, Ag, Ir, Au and Pt (in addition to Hg and Cd) by the reduction of metal ions by tetrahydroborate(III) has been described, and analytical procedures for the determination of Cu, 2 Zn, 3 Au 4 and Ag, Au, Co, Cu and Ni 5 have been published. Despite this, very little is known about the nature and mechanism of production of such species.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast to Hg and Cd, molecular species are certainly produced, as free atoms were not observed without an ''atomization'' environment. 3,4,6 Metal hydrides are usually cautiously suspected, 2,3,6,7 but never proven beyond doubt.…”

Section: Introductionmentioning

confidence: 99%

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Surfactant assisted chemical vapour generation of silver for AAS and ICP-OES: a mechanistic study

Matoušek

Sturgeon

2003

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 Surfactant assisted chemical vapour generation of silver for AAS and ICP-OES: a mechanistic study Matousek, T.; 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=5764798&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=5764798&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/b211540aJournal of Analytical Atomic Spectrometry, 18, 5, pp. 487-494, 2003 Surfactant assisted chemical vapour generation of silver for AAS and ICP-OES: a mechanistic study{ A chemical vapour generation (CVG) procedure for the production of volatile species of Ag was developed and studied using AAS and ICP-OES detection. A characteristic mass of 0.12 ng was achieved using a miniature diffusion flame atomizer-AAS system, whereas a 38-fold higher sensitivity (as cps per ng of introduced analyte) compared with conventional liquid nebulization was obtained with ICP-OES. The overall efficiency of introduction of Ag to the plasma was verified to be over 20%. More than one order of magnitude enhancement of efficiency was obtained by the addition of a surfactant (Triton X-100 in combination with an antifoaming agent), the effect of which, however, cannot be ascribed to the formation of organized media. Experiments concerning the mechanism of the CVG, transport and memory effect are discussed: Ag CVG is not a simple one-step process as is the case for CVG of selenium, but rather a two-step procedure. Transport properties of the volatile Ag species rese...

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Section: Procedures Trapped and Residual Ag Determinationmentioning

confidence: 99%

Section: Sensitivity Drift and Memory Effectsmentioning

confidence: 99%

Section: Transport and Trapping Of Volatile Ag Speciesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Surfactant assisted chemical vapour generation of silver for AAS and ICP-OES: a mechanistic study

Matoušek

Sturgeon

2003

J. Anal. At. Spectrom.

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Simultaneous determination of arsenic and selenium in biological samples by HG-AFS

Sun

Liu

et al. 2005

Anal Bioanal Chem

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A new method is proposed for simultaneous determination of traces of arsenic (As) and selenium (Se) in biological samples by hydride-generation double-channel non-dispersive atomic-fluorescence spectrometry (HG-AFS) from tartaric acid media. The effects of analytical conditions on fluorescence signal intensity were investigated and optimized. Interferences from coexisting ions were evaluated. Under optimum conditions linear response ranges above 20 microg L(-1) for As and 32 microg L(-1) for Se were obtained with detection limits of 0.13 and 0.12 microg L(-1), respectively. The precision for eleven-fold determination of As at the 4 microg L(-1) level and of Se at the 8 microg L(-1) level were 2.7 and 1.9% (RSD), respectively. Recoveries of 92.5-95.5% for As and 101.2-108.4% for Se were obtained for four biological samples and two certified biological reference materials. The proposed method has the advantages of simple operation, high sensitivity, and high efficiency; it was successfully used for simultaneous determination of As and Se in biological samples.

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Chemical vapor generation of noble metals for analytical spectrometry

Pohl

Prusisz

2006

Anal Bioanal Chem

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As is apparent from the literature devoted to the analytical atomic spectrometry, chemical vapor generation (CVG) of noble metals by reaction with tetrahydroborate in acidic media may enhance the introduction of these elements into different atomic spectrometric sources. Recent developments in the CVG of noble metals species by reaction with tetrahydroborate in acidic medium are surveyed. Different aspects of this novel technique are discussed, including type of instrumentation used for the reaction, separation and transport of the species, effect of chemical and physical factors, identification of the species, and the efficiency of the process. Limitations and future prospects of the CVG technique are discussed.

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Determination of zinc in food using atomic fluorescence spectrometry by hydride generation from organized media

Cited by 61 publications

References 22 publications

Surfactant assisted chemical vapour generation of silver for AAS and ICP-OES: a mechanistic study

Surfactant assisted chemical vapour generation of silver for AAS and ICP-OES: a mechanistic study

Simultaneous determination of arsenic and selenium in biological samples by HG-AFS

Chemical vapor generation of noble metals for analytical spectrometry

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