A comparative study of sheathing devices to increase robustness in inductively coupled plasma optical emission spectrometry via a nitrogen flow
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/205159 |
Resumo: | Five different glass sheathing devices were used to introduce 20 mL min 1 N2 sheathing gas around the effluent from the spray chamber to see the effect of their dimensions on plasma robustness as measured using the Mg II 280.270 nm/Mg I 285.213 nm emission signal ratio in inductively coupled plasma (ICP) optical emission spectrometry (OES). A clear relationship between device dimensions and the plasma robustness profile along the ICP central channel was observed. With an aerosol inlet having an inner diameter of 1.0 cm in the sheathing device, mixing of N2 with the aerosol was minimised and the resulting sheath increased robustness, the higher thermal conductivity of N2 versus Ar likely improving energy transfer between the bulk plasma and the central channel. The configuration of the outlet is also important, as any bottleneck favours mixing of N2 with the aerosol, which in turn cools the plasma, thereby shifting the region of maximum robustness to higher above the load coil. Regardless of device dimensions, plasma robustness was always better with N2 sheathing gas. An increased ion-toatom emission signal ratio also resulted for other elements than Mg. The presence of N2 also seems to affect excitation mechanisms, such as charge transfer between NO+ and Cd or Ni, which appears to take place at higher observation height, after N2 has had enough time to diffuse into the central channel. |
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Scheffler, Guilherme LuizPozebon, DirceBeauchemin, Diane2020-01-31T04:12:13Z20180267-9477http://hdl.handle.net/10183/205159001097852Five different glass sheathing devices were used to introduce 20 mL min 1 N2 sheathing gas around the effluent from the spray chamber to see the effect of their dimensions on plasma robustness as measured using the Mg II 280.270 nm/Mg I 285.213 nm emission signal ratio in inductively coupled plasma (ICP) optical emission spectrometry (OES). A clear relationship between device dimensions and the plasma robustness profile along the ICP central channel was observed. With an aerosol inlet having an inner diameter of 1.0 cm in the sheathing device, mixing of N2 with the aerosol was minimised and the resulting sheath increased robustness, the higher thermal conductivity of N2 versus Ar likely improving energy transfer between the bulk plasma and the central channel. The configuration of the outlet is also important, as any bottleneck favours mixing of N2 with the aerosol, which in turn cools the plasma, thereby shifting the region of maximum robustness to higher above the load coil. Regardless of device dimensions, plasma robustness was always better with N2 sheathing gas. An increased ion-toatom emission signal ratio also resulted for other elements than Mg. The presence of N2 also seems to affect excitation mechanisms, such as charge transfer between NO+ and Cd or Ni, which appears to take place at higher observation height, after N2 has had enough time to diffuse into the central channel.application/pdfengJournal of Analytical Atomic Spectrometry. Inglaterra. Vol. 33, no. 7 (2018), p. 1269-1273NitrogênioEspectrometria de emissão ótica com plasma indutivamente acopladoA comparative study of sheathing devices to increase robustness in inductively coupled plasma optical emission spectrometry via a nitrogen flowEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001097852.pdf.txt001097852.pdf.txtExtracted Texttext/plain29117http://www.lume.ufrgs.br/bitstream/10183/205159/2/001097852.pdf.txt91b86e992d0d75addb107e394a51e4e7MD52ORIGINAL001097852.pdfTexto completo (inglês)application/pdf877622http://www.lume.ufrgs.br/bitstream/10183/205159/1/001097852.pdf492eb3b0f9695b60c6e98581bcd24e93MD5110183/2051592020-12-05 05:27:43.457244oai:www.lume.ufrgs.br:10183/205159Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2020-12-05T07:27:43Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
A comparative study of sheathing devices to increase robustness in inductively coupled plasma optical emission spectrometry via a nitrogen flow |
title |
A comparative study of sheathing devices to increase robustness in inductively coupled plasma optical emission spectrometry via a nitrogen flow |
spellingShingle |
A comparative study of sheathing devices to increase robustness in inductively coupled plasma optical emission spectrometry via a nitrogen flow Scheffler, Guilherme Luiz Nitrogênio Espectrometria de emissão ótica com plasma indutivamente acoplado |
title_short |
A comparative study of sheathing devices to increase robustness in inductively coupled plasma optical emission spectrometry via a nitrogen flow |
title_full |
A comparative study of sheathing devices to increase robustness in inductively coupled plasma optical emission spectrometry via a nitrogen flow |
title_fullStr |
A comparative study of sheathing devices to increase robustness in inductively coupled plasma optical emission spectrometry via a nitrogen flow |
title_full_unstemmed |
A comparative study of sheathing devices to increase robustness in inductively coupled plasma optical emission spectrometry via a nitrogen flow |
title_sort |
A comparative study of sheathing devices to increase robustness in inductively coupled plasma optical emission spectrometry via a nitrogen flow |
author |
Scheffler, Guilherme Luiz |
author_facet |
Scheffler, Guilherme Luiz Pozebon, Dirce Beauchemin, Diane |
author_role |
author |
author2 |
Pozebon, Dirce Beauchemin, Diane |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Scheffler, Guilherme Luiz Pozebon, Dirce Beauchemin, Diane |
dc.subject.por.fl_str_mv |
Nitrogênio Espectrometria de emissão ótica com plasma indutivamente acoplado |
topic |
Nitrogênio Espectrometria de emissão ótica com plasma indutivamente acoplado |
description |
Five different glass sheathing devices were used to introduce 20 mL min 1 N2 sheathing gas around the effluent from the spray chamber to see the effect of their dimensions on plasma robustness as measured using the Mg II 280.270 nm/Mg I 285.213 nm emission signal ratio in inductively coupled plasma (ICP) optical emission spectrometry (OES). A clear relationship between device dimensions and the plasma robustness profile along the ICP central channel was observed. With an aerosol inlet having an inner diameter of 1.0 cm in the sheathing device, mixing of N2 with the aerosol was minimised and the resulting sheath increased robustness, the higher thermal conductivity of N2 versus Ar likely improving energy transfer between the bulk plasma and the central channel. The configuration of the outlet is also important, as any bottleneck favours mixing of N2 with the aerosol, which in turn cools the plasma, thereby shifting the region of maximum robustness to higher above the load coil. Regardless of device dimensions, plasma robustness was always better with N2 sheathing gas. An increased ion-toatom emission signal ratio also resulted for other elements than Mg. The presence of N2 also seems to affect excitation mechanisms, such as charge transfer between NO+ and Cd or Ni, which appears to take place at higher observation height, after N2 has had enough time to diffuse into the central channel. |
publishDate |
2018 |
dc.date.issued.fl_str_mv |
2018 |
dc.date.accessioned.fl_str_mv |
2020-01-31T04:12:13Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/205159 |
dc.identifier.issn.pt_BR.fl_str_mv |
0267-9477 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001097852 |
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0267-9477 001097852 |
url |
http://hdl.handle.net/10183/205159 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Journal of Analytical Atomic Spectrometry. Inglaterra. Vol. 33, no. 7 (2018), p. 1269-1273 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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