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Article: Novel laser sampling technique for inductively coupled plasma atomic emission spectrometry

TitleNovel laser sampling technique for inductively coupled plasma atomic emission spectrometry
Authors
KeywordsAtomic emission spectrometry
Back-surface laser ablation
Inductively coupled plasma
Laser sampling
Issue Date1997
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/jaas
Citation
Journal Of Analytical Atomic Spectrometry, 1997, v. 12 n. 1, p. 7-12 How to Cite?
AbstractA novel laser sampling technique, back-surface ablation, has been developed for ICP-AES. Samples are coated onto a transparent substrate and a laser beam is irradiated onto the sample through the substrate instead of sampling directly from the sample surface. As part of the sample is vaporized by the laser beam, a high pressure develops at the sample-substrate interface. The sample at the laser spot is explosively and completely removed by the expanding vapour. Sampling efficiency is up to ten times higher than conventional 'front-surface' laser sampling. Also, preferential vaporization is minimized because of complete removal of the sample at the laser spot. The risk of inaccurate chemical analysis associated with non-stoichiometric thermal vaporization in front surface laser sampling is reduced. Two methods of calibration, viz., standard additions and calibration with standards in a poly (vinyl alcohol) matrix, were used for quantitative elemental analysis of household paints using front- and back-surface ablation-ICP-AES. Internal standards were used to compensate for pulse-to-pulse laser energy fluctuation and sample thickness variation across a sample. Ten elements with different thermal properties and at concentrations ranging from 10 to 1000 ppm were determined and the elemental concentrations were compared with those of microwave digestion/solution nebulization ICP-AES. Back-surface ablation appears to be more accurate than conventional front-surface ablation.
Persistent Identifierhttp://hdl.handle.net/10722/69426
ISSN
2015 Impact Factor: 3.379
2015 SCImago Journal Rankings: 1.022
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLam, KKKen_HK
dc.contributor.authorChan, WTen_HK
dc.date.accessioned2010-09-06T06:13:33Z-
dc.date.available2010-09-06T06:13:33Z-
dc.date.issued1997en_HK
dc.identifier.citationJournal Of Analytical Atomic Spectrometry, 1997, v. 12 n. 1, p. 7-12en_HK
dc.identifier.issn0267-9477en_HK
dc.identifier.urihttp://hdl.handle.net/10722/69426-
dc.description.abstractA novel laser sampling technique, back-surface ablation, has been developed for ICP-AES. Samples are coated onto a transparent substrate and a laser beam is irradiated onto the sample through the substrate instead of sampling directly from the sample surface. As part of the sample is vaporized by the laser beam, a high pressure develops at the sample-substrate interface. The sample at the laser spot is explosively and completely removed by the expanding vapour. Sampling efficiency is up to ten times higher than conventional 'front-surface' laser sampling. Also, preferential vaporization is minimized because of complete removal of the sample at the laser spot. The risk of inaccurate chemical analysis associated with non-stoichiometric thermal vaporization in front surface laser sampling is reduced. Two methods of calibration, viz., standard additions and calibration with standards in a poly (vinyl alcohol) matrix, were used for quantitative elemental analysis of household paints using front- and back-surface ablation-ICP-AES. Internal standards were used to compensate for pulse-to-pulse laser energy fluctuation and sample thickness variation across a sample. Ten elements with different thermal properties and at concentrations ranging from 10 to 1000 ppm were determined and the elemental concentrations were compared with those of microwave digestion/solution nebulization ICP-AES. Back-surface ablation appears to be more accurate than conventional front-surface ablation.en_HK
dc.languageengen_HK
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/jaasen_HK
dc.relation.ispartofJournal of Analytical Atomic Spectrometryen_HK
dc.subjectAtomic emission spectrometryen_HK
dc.subjectBack-surface laser ablationen_HK
dc.subjectInductively coupled plasmaen_HK
dc.subjectLaser samplingen_HK
dc.titleNovel laser sampling technique for inductively coupled plasma atomic emission spectrometryen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0267-9477&volume=12&spage=7&epage=12&date=1997&atitle=Novel+laser+sampling+technique+for+inductively+coupled+plasma+atomic+emission+spectrometryen_HK
dc.identifier.emailChan, WT:wtchan@hku.hken_HK
dc.identifier.authorityChan, WT=rp00668en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/A602822E-
dc.identifier.scopuseid_2-s2.0-0030786257en_HK
dc.identifier.hkuros25948en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0030786257&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume12en_HK
dc.identifier.issue1en_HK
dc.identifier.spage7en_HK
dc.identifier.epage12en_HK
dc.identifier.isiWOS:A1997WE48000009-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridLam, KKK=7403656831en_HK
dc.identifier.scopusauthoridChan, WT=7403918827en_HK

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