Chemical vapor generation—electrothermal atomic absorption spectrometry: new perspectives

Luna, Aderval S.; Pereira, Hugo Borges; Takase, Iracema; Gonçalves, Ramiro; Sturgeon, Ralph E.; Campos, Reinaldo Calixto de

doi:10.1016/s0584-8547(02)00204-5

Cited by 35 publications

(22 citation statements)

References 14 publications

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“…The generated volatile species were determined using different atomic spectrometry techniques. [7][8][9][10][11][12][13][14][15][16][17] Luna et al described the formation of volatile species of Zn and some other transition metals by atomic absorption spectrometry (AAS). 7 Inductively-coupled plasma atomic emission spectrometry (ICP-AES) has been used for determination of Zn, followed by chemical vapor generation using borohydride.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Electrochemical Generation of Volatile Zinc Hydride by Heated Quartz Tube Atomizer Atomic Absorption Spectrometry

Arbab-Zavar

Chamsaz

Youssefi³

et al. 2012

ANAL. SCI.

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Electrochemical hydride generation (EcHG) as a sample introduction system for determination of zinc was developed. It was directly coupled to an electrically heated quartz tube atomizer (QTA) atomic absorption spectrometry (AAS) system. The hydride generator is a laboratory-made semi-batch electrolytic cell that consists of a lead-tin alloy cathode and a platinum anode. The effects of typical parameters on the generation efficiency of the technique, such as types of cathode material and catholyte and anolyte solutions, were studied. The influences of numerical experimental operating parameters on the analytical signal were evaluated in detail and optimum conditions were obtained. The analytical figures of merit for the developed method were determined. The calibration curve was linear up to 300 ng mL(-1) of Zn. A concentration detection limit (3σ, n = 9) of 11 ng mL(-1) Zn and a relative standard deviation of 5.0% (RSD, n = 9) for 200 ng mL(-1) Zn were accessed. In addition, the susceptibility of interference from various ions was evaluated. The accuracy of the method was verified by determination of Zn in a certified reference material and in tap water. The achieved concentrations were found to be in good agreement with both the certified value and the data obtained using flame AAS.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Electrochemical Generation of Volatile Zinc Hydride by Heated Quartz Tube Atomizer Atomic Absorption Spectrometry

Arbab-Zavar

Chamsaz

Youssefi³

et al. 2012

ANAL. SCI.

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“…[1][2][3][4][5][6] The advantages as well as the limitations and prospects of CVG were thoroughly discussed in a recent review. 7 There are indications that the CVG process consists of two steps: 1,8 the first one very fast, probably corresponding to reduction of the analyte to the metal; the second rather slow, possibly the actual formation and/or release of volatile species.…”

Section: Introductionmentioning

confidence: 99%

Chemical vapour generation of silver: reduced palladium as permanent reaction modifier for enhanced performance

Matoušek

Sturgeon

2004

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 Chemical vapour generation of silver: reduced palladium as permanent reaction modifier for enhanced performance Matousek, T.; Sturgeon, R. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=8899596&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=8899596&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.

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“…7 Using this approach, this group studied the in situ trapping of volatile species of Ag, Cu, Cd, and Zn at the Ir treated tube furnace. 8 Du and Xu 4 have studied the generation of volatile Au species in an acidified medium at room temperature by reduction with NaBH 4 using flow injection vapor generation atomic absorption spectrometry (FI-VGAAS) in the presence of DDTC. It was found that only microgram amounts of DDTC in the sample solution resulted in marked enhancement of the signal from gold.…”

Section: Introductionmentioning

confidence: 99%

Electrothermal Atomic Absorption Spectrometric Determination of Gold by Vapor Formation and in situ Trapping in Graphite Tubes

Ertaş

Ataman

2004

Appl Spectrosc

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Gold was determined in ore samples following generation, separation, collection on a graphite cuvette inner wall, and atomization of its volatile species formed by combining an acidified sample solution with an aqueous sodium tetrahydroborate solution at room temperature. A detection limit of 2.6 microg L(-1) (3sigma) was obtained with a 5.0 mL sample volume. Precision of replicate measurements was typically 10% RSD. The overall efficiency of the volatile species generation, transport, and trapping process was 0.4%. Atomization of gold from Pd, Ir, Cu, Ag, and W coated graphite cuvettes, following by trapping of the gaseous volatile gold species on these surfaces, has been investigated. Pd coating was found to decrease the sensitivity. Five microg of Ir, 20 microg of Cu, 20 microg of Ag, and 5 microg of W were chosen as optimum masses. W treatment was the best one for sensitivity enhancement, having an improvement factor of 2.4. Silanization of glass surfaces significantly decreased memory effects; improved peak shapes were thus obtained for flow injection vapor generation atomic absorption spectrometry (FI-VGAAS). The method described in this study was used for the determination of gold in an ore reference material, Gold Ore (MA-1b), Canadian Reference Materials Program.

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Chemical vapor generation—electrothermal atomic absorption spectrometry: new perspectives

Cited by 35 publications

References 14 publications

Evaluation of Electrochemical Generation of Volatile Zinc Hydride by Heated Quartz Tube Atomizer Atomic Absorption Spectrometry

Evaluation of Electrochemical Generation of Volatile Zinc Hydride by Heated Quartz Tube Atomizer Atomic Absorption Spectrometry

Chemical vapour generation of silver: reduced palladium as permanent reaction modifier for enhanced performance

Electrothermal Atomic Absorption Spectrometric Determination of Gold by Vapor Formation and in situ Trapping in Graphite Tubes

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