Furnace atomization plasma excitation spectroscopy: spectral, spatial, and temporal characteristics

Hettipathirana, Terrance D.; Blades, Michael W.

doi:10.1016/0584-8547(92)80042-f

Cited by 22 publications

(7 citation statements)

References 14 publications

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“…Optimum sampling for atomic Fe z occurs proximate to the center electrode, whereas molecular ion intensity is most pronounced near the periphery of the source around the grounded walls of the enclosure. Ideally, a symmetric pattern should be present, re¯ecting the radially symmetric structure of the plasma 14,19 wherein maximum excitation, and thus ionization, occurs predominantly in a ring around the center electrode with a second, less intense discharge around the periphery of the counter electrode. As such, most intensive fragmentation occurs within the most energetic part of the plasma located in the annulus of space around the powered electrode.…”

Section: Resultsmentioning

confidence: 99%

Atmospheric pressure helium rf plasma source for atomic and molecular mass spectrometry

Guevremont¹,

Sturgeon²

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 Atmospheric pressure helium rf plasma source for atomic and molecular mass spectrometry Guevremont, R.; Sturgeon, R. E.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=5765078&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=5765078&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/a903914gJournal of Analytical Atomic Spectrometry, 15, 1, pp. 37-42, 2000-01-07 Full PaperAtmospheric pressure helium rf plasma source for atomic and molecular mass spectrometry A capacitively coupled low power atmospheric pressure rf He plasma established within a thermostated cylindrical steel block serves as a source for the generation of molecular and atomic ions for mass spectral analysis. Volatile analytes separated by gas chromatography are admitted to the source through a coaxial rfpowered center electrode. Variation of the forward power, in the range 5±100 W, and the position of the plasma relative to the differentially pumped extraction ori®ce of the mass spectrometer, permits control over the relative intensities of parent and daughter ion products of the decomposition of organometallic compounds introduced into the source. Spectral features range from simple response from atomic ions to the detection of the parent molecular compounds and combinations of the two between the extremes of operating conditions. Ferrocene, triethyllead chloride and ethylmercury chloride were used to illustrate the application of the technique.

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Section: Resultsmentioning

confidence: 99%

Atmospheric pressure helium rf plasma source for atomic and molecular mass spectrometry

Guevremont¹,

Sturgeon²

2000

J. Anal. At. Spectrom.

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“…A complete description of this FAPES source assembly can be found elsewhere. 8 The plasma was generated and sustained using an Advanced Energy (Fort Collins, CO, USA) Model RFX-600, 13.56 MHz r.f. generator, an Advanced Energy Model ATX-600 automatic tuner and an Advanced Energy Model 50 17-000-G impedance-matching network.…”

Section: Experimental Instrumentationmentioning

confidence: 99%

Temporal emission and absorption characteristics of silver, lead and manganese in furnace atomization plasma excitation spectrometry

Hettipathirana¹,

Blades²

1992

J. Anal. At. Spectrom.

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The temporal behaviour of the signal measured for Ag, Pb and Mn in furnace atomization plasma excitation spectrometry was studied using atomic emission and atomic absorption spectrometry. Analyte was deposited both on the wall and on the r.f. electrode with and without the r.f. power applied. Analyte condensation on the r.f. electrode is observed when no plasma is formed. When the plasma is formed inside the furnace it heats the electrode such that, for Ag and Pb, condensation is not observed except for large amounts of analyte. For Ag and Mn, the appearance temperatures and peak temperatures are not significantly affected by the plasma relative to the response obtained using a graphite furnace. For Pb, appearance and peak temperatures are shifted significantly earlier. For Pb, atom formation may be effected by the presence of CO in the gas phase generated from oxidation of the graphite furnace wall and electrode. The role of carbon in atom formation was studied by depositing the sample on both tungsten and graphite electrodes.

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“…A gas flow through the furnace is not required, although a flow of about 20 -30 mL/min around the graphite furnace is used. Excitation temperatures for the FAPES source have been rep orted to be in the range of 2900 to 5000 K [91] , [92] ; however, the results are preliminary and full parametric studies have not yet been undertaken. During routine op eration for analytical determinations, a sample (normally 5-50 il L) is dep osited inside the graphite furnace through a dosing hole located in the top of the graphite tube, and the samp le is atomized into the plasma by electrically heating the graphite tube.…”

Section: A Capacitively Coupled Plasmasmentioning

confidence: 99%

Application of weakly ionized plasmas for materials sampling and analysis

Blades

Banks

Gill

et al. 1991

IEEE Trans. Plasma Sci.

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Furnace atomization plasma excitation spectroscopy: spectral, spatial, and temporal characteristics

Cited by 22 publications

References 14 publications

Atmospheric pressure helium rf plasma source for atomic and molecular mass spectrometry

Atmospheric pressure helium rf plasma source for atomic and molecular mass spectrometry

Temporal emission and absorption characteristics of silver, lead and manganese in furnace atomization plasma excitation spectrometry

Application of weakly ionized plasmas for materials sampling and analysis

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