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Article: Plasma-related matrix effects in inductively coupled plasma - Atomic emission spectrometry by group I and group II matrix-elements

TitlePlasma-related matrix effects in inductively coupled plasma - Atomic emission spectrometry by group I and group II matrix-elements
Authors
KeywordsCharge transfer
Excitation mechanism
Inductively coupled plasma-atomic emission spectrometry
Matrix effect
Issue Date2003
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/sab
Citation
Spectrochimica Acta - Part B Atomic Spectroscopy, 2003, v. 58 n. 7, p. 1301-1317 How to Cite?
AbstractThe effects of Na, K, Ca and Ba matrices on the plasma excitation conditions in inductively coupled plasma-atomic emission spectrometry (ICP-AES) were studied. Normalized relative intensity was used to indicate the extent of the plasma-related matrix effects. The group I matrices have no effects on the plasma excitation conditions. In contrast, the group II matrices depress the normalized relative intensities of some spectral lines. Specifically, the Group II matrices have no effects on the normalized relative intensity of atomic lines of low upper energy level (soft lines), but reduce the normalized relative intensity of some ionic lines and atomic lines of high energy level (hard lines). The Group II matrices seem to shift the Saha balance of the analytes only; no shift in the Boltzmann balance was observed experimentally. Moreover, for some ionic lines with sum of ionization and excitation potentials close to the ionization potential of argon (15.75 eV), the matrix effect is smaller than other ionic lines of the same element. The reduced matrix effects may be attributed qualitatively to charge transfer excitation mechanism of these ionic lines. Charge transfer reaction renders ionic emission lines from the quasi-resonant levels similar in characteristics of atomic lines. The contribution of charge transfer relative to excitation by other non-specific excitation mechanisms (via Saha balance and Boltzmann balance) determines the degree of atomic behavior of a quasi-resonant level. A significant conclusion of this study is that plasma-related matrix effect depends strongly on the excitation mechanism of a spectral line. Since, in general, more than one excitation mechanism may contribute to the overall excitation of an emission line, the observed matrix effects reflect the sum of the effects due to individual excitation mechanisms. Excitation mechanisms, in addition to the often-used total excitation energy, should be considered in matrix effect studies. © 2003 Elsevier Science B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/69556
ISSN
2015 Impact Factor: 3.289
2015 SCImago Journal Rankings: 1.031
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChan, GCYen_HK
dc.contributor.authorChan, WTen_HK
dc.date.accessioned2010-09-06T06:14:45Z-
dc.date.available2010-09-06T06:14:45Z-
dc.date.issued2003en_HK
dc.identifier.citationSpectrochimica Acta - Part B Atomic Spectroscopy, 2003, v. 58 n. 7, p. 1301-1317en_HK
dc.identifier.issn0584-8547en_HK
dc.identifier.urihttp://hdl.handle.net/10722/69556-
dc.description.abstractThe effects of Na, K, Ca and Ba matrices on the plasma excitation conditions in inductively coupled plasma-atomic emission spectrometry (ICP-AES) were studied. Normalized relative intensity was used to indicate the extent of the plasma-related matrix effects. The group I matrices have no effects on the plasma excitation conditions. In contrast, the group II matrices depress the normalized relative intensities of some spectral lines. Specifically, the Group II matrices have no effects on the normalized relative intensity of atomic lines of low upper energy level (soft lines), but reduce the normalized relative intensity of some ionic lines and atomic lines of high energy level (hard lines). The Group II matrices seem to shift the Saha balance of the analytes only; no shift in the Boltzmann balance was observed experimentally. Moreover, for some ionic lines with sum of ionization and excitation potentials close to the ionization potential of argon (15.75 eV), the matrix effect is smaller than other ionic lines of the same element. The reduced matrix effects may be attributed qualitatively to charge transfer excitation mechanism of these ionic lines. Charge transfer reaction renders ionic emission lines from the quasi-resonant levels similar in characteristics of atomic lines. The contribution of charge transfer relative to excitation by other non-specific excitation mechanisms (via Saha balance and Boltzmann balance) determines the degree of atomic behavior of a quasi-resonant level. A significant conclusion of this study is that plasma-related matrix effect depends strongly on the excitation mechanism of a spectral line. Since, in general, more than one excitation mechanism may contribute to the overall excitation of an emission line, the observed matrix effects reflect the sum of the effects due to individual excitation mechanisms. Excitation mechanisms, in addition to the often-used total excitation energy, should be considered in matrix effect studies. © 2003 Elsevier Science B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/saben_HK
dc.relation.ispartofSpectrochimica Acta - Part B Atomic Spectroscopyen_HK
dc.rightsSpectrochimica Acta Part B: Atomic Spectroscopy. Copyright © Elsevier BV.en_HK
dc.subjectCharge transferen_HK
dc.subjectExcitation mechanismen_HK
dc.subjectInductively coupled plasma-atomic emission spectrometryen_HK
dc.subjectMatrix effecten_HK
dc.titlePlasma-related matrix effects in inductively coupled plasma - Atomic emission spectrometry by group I and group II matrix-elementsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0584-8547&volume=58&spage=1301&epage=1317&date=2003&atitle=Plasma-related+matrix+effects+in+inductively+coupled+plasma-atomic+emission+spectrometry+by+group+I+and+group+II+matrix-elements+en_HK
dc.identifier.emailChan, WT:wtchan@hku.hken_HK
dc.identifier.authorityChan, WT=rp00668en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0584-8547(03)00055-7en_HK
dc.identifier.scopuseid_2-s2.0-0037560271en_HK
dc.identifier.hkuros92598en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0037560271&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume58en_HK
dc.identifier.issue7en_HK
dc.identifier.spage1301en_HK
dc.identifier.epage1317en_HK
dc.identifier.isiWOS:000184677600005-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridChan, GCY=7202355292en_HK
dc.identifier.scopusauthoridChan, WT=7403918827en_HK

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