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Article: Plasma-related matrix effects in inductively coupled plasma - Atomic emission spectrometry by group I and group II matrix-elements
Title | Plasma-related matrix effects in inductively coupled plasma - Atomic emission spectrometry by group I and group II matrix-elements |
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Authors | |
Keywords | Charge transfer Excitation mechanism Inductively coupled plasma-atomic emission spectrometry Matrix effect |
Issue Date | 2003 |
Publisher | Elsevier 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? |
Abstract | The 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 Identifier | http://hdl.handle.net/10722/69556 |
ISSN | 2023 Impact Factor: 3.2 2023 SCImago Journal Rankings: 0.619 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Chan, GCY | en_HK |
dc.contributor.author | Chan, WT | en_HK |
dc.date.accessioned | 2010-09-06T06:14:45Z | - |
dc.date.available | 2010-09-06T06:14:45Z | - |
dc.date.issued | 2003 | en_HK |
dc.identifier.citation | Spectrochimica Acta - Part B Atomic Spectroscopy, 2003, v. 58 n. 7, p. 1301-1317 | en_HK |
dc.identifier.issn | 0584-8547 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/69556 | - |
dc.description.abstract | The 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.language | eng | en_HK |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/sab | en_HK |
dc.relation.ispartof | Spectrochimica Acta - Part B Atomic Spectroscopy | en_HK |
dc.rights | Spectrochimica Acta Part B: Atomic Spectroscopy. Copyright © Elsevier BV. | en_HK |
dc.subject | Charge transfer | en_HK |
dc.subject | Excitation mechanism | en_HK |
dc.subject | Inductively coupled plasma-atomic emission spectrometry | en_HK |
dc.subject | Matrix effect | en_HK |
dc.title | Plasma-related matrix effects in inductively coupled plasma - Atomic emission spectrometry by group I and group II matrix-elements | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://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.email | Chan, WT:wtchan@hku.hk | en_HK |
dc.identifier.authority | Chan, WT=rp00668 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/S0584-8547(03)00055-7 | en_HK |
dc.identifier.scopus | eid_2-s2.0-0037560271 | en_HK |
dc.identifier.hkuros | 92598 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-0037560271&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 58 | en_HK |
dc.identifier.issue | 7 | en_HK |
dc.identifier.spage | 1301 | en_HK |
dc.identifier.epage | 1317 | en_HK |
dc.identifier.isi | WOS:000184677600005 | - |
dc.publisher.place | Netherlands | en_HK |
dc.identifier.scopusauthorid | Chan, GCY=7202355292 | en_HK |
dc.identifier.scopusauthorid | Chan, WT=7403918827 | en_HK |
dc.identifier.issnl | 0584-8547 | - |