Determinations of phosphorus in fertilizers by spark discharge-assisted laser-induced breakdown spectroscopy
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 UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.microc.2018.03.011 http://hdl.handle.net/11449/179652 |
Resumo: | A spark discharge system was coupled to laser-induced breakdown spectroscopy (SD-LIBS) to improve sensitivity in the determination of P in fertilizers. A LIBS system consisting of a Q-switched Nd:YAG laser operating at 1064 nm and emitting pulses at 50 mJ with a fluence of 70 J cm−2 at the focal point was used. Results of preliminary experiments suggested that the most appropriate wavelength to measure P was the P (I) line at 214.9 nm, which did not show interferences by Fe, Cu and Zn. The electrical discharge was provided by a homemade high-voltage electronic circuit consisting of two cylindrical tungsten electrodes at the optimized output voltage of 4.5 kV, with tips arranged at the optimal distances of 4 mm between them and 2 mm above the sample surface. To minimize the expected matrix effects calibration standards of P2O5 in the range of 4.8 and 33.3% were prepared by mixing various amounts of a phosphate rock reference material (SRM-120c) with a mixture of CaCO3, CaSO4, (NH2)2CO and KCl at a 1:1:1:1 mass ratio. The calibration curves obtained at a 4.5 kV SD-LIBS output voltage showed correlation coefficients ≥0.993, RSD ≤8% and LOQ 5.3% (m/m) P2O5. Data obtained by analyzing commercial samples by the proposed system were in good agreement, at 95% confidence level, with those obtained by using high-resolution continuum-source flame atomic absorption spectroscopy. |
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Determinations of phosphorus in fertilizers by spark discharge-assisted laser-induced breakdown spectroscopyFertilizer analysisLIBSPhosphorus determinationSpark dischargeA spark discharge system was coupled to laser-induced breakdown spectroscopy (SD-LIBS) to improve sensitivity in the determination of P in fertilizers. A LIBS system consisting of a Q-switched Nd:YAG laser operating at 1064 nm and emitting pulses at 50 mJ with a fluence of 70 J cm−2 at the focal point was used. Results of preliminary experiments suggested that the most appropriate wavelength to measure P was the P (I) line at 214.9 nm, which did not show interferences by Fe, Cu and Zn. The electrical discharge was provided by a homemade high-voltage electronic circuit consisting of two cylindrical tungsten electrodes at the optimized output voltage of 4.5 kV, with tips arranged at the optimal distances of 4 mm between them and 2 mm above the sample surface. To minimize the expected matrix effects calibration standards of P2O5 in the range of 4.8 and 33.3% were prepared by mixing various amounts of a phosphate rock reference material (SRM-120c) with a mixture of CaCO3, CaSO4, (NH2)2CO and KCl at a 1:1:1:1 mass ratio. The calibration curves obtained at a 4.5 kV SD-LIBS output voltage showed correlation coefficients ≥0.993, RSD ≤8% and LOQ 5.3% (m/m) P2O5. Data obtained by analyzing commercial samples by the proposed system were in good agreement, at 95% confidence level, with those obtained by using high-resolution continuum-source flame atomic absorption spectroscopy.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)São Paulo State University - UNESP Analytical Chemistry Department, P.O. Box 355University of São Paulo – USP Department of Electrical and Computer EngineeringCNR-Istituto di Nanotecnologia (NANOTEC) – PLasMI Lab, Via Amendola 122/DFederal University of São Paulo - UNIFESP Exact and Earth Sciences DepartmentSão Paulo State University - UNESP Analytical Chemistry Department, P.O. Box 355CNPq: 141977/2016-7FAPESP: 2004/14212-0CNPq: 2015/24757-9CNPq: 303255/2013-7CNPq: 311085/2014-8Universidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)CNR-Istituto di Nanotecnologia (NANOTEC) – PLasMI LabVieira, Alan Lima [UNESP]Silva, Tiago Varão [UNESP]de Sousa, Felipe Schiavon InocêncioSenesi, Giorgio SaverioJúnior, Dário SantosFerreira, Edilene Cristina [UNESP]Neto, José Anchieta Gomes [UNESP]2018-12-11T17:36:12Z2018-12-11T17:36:12Z2018-06-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article322-326application/pdfhttp://dx.doi.org/10.1016/j.microc.2018.03.011Microchemical Journal, v. 139, p. 322-326.0026-265Xhttp://hdl.handle.net/11449/17965210.1016/j.microc.2018.03.0112-s2.0-850434517702-s2.0-85043451770.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMicrochemical Journalinfo:eu-repo/semantics/openAccess2023-10-02T06:06:20Zoai:repositorio.unesp.br:11449/179652Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T13:47:05.614767Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Determinations of phosphorus in fertilizers by spark discharge-assisted laser-induced breakdown spectroscopy |
title |
Determinations of phosphorus in fertilizers by spark discharge-assisted laser-induced breakdown spectroscopy |
spellingShingle |
Determinations of phosphorus in fertilizers by spark discharge-assisted laser-induced breakdown spectroscopy Vieira, Alan Lima [UNESP] Fertilizer analysis LIBS Phosphorus determination Spark discharge |
title_short |
Determinations of phosphorus in fertilizers by spark discharge-assisted laser-induced breakdown spectroscopy |
title_full |
Determinations of phosphorus in fertilizers by spark discharge-assisted laser-induced breakdown spectroscopy |
title_fullStr |
Determinations of phosphorus in fertilizers by spark discharge-assisted laser-induced breakdown spectroscopy |
title_full_unstemmed |
Determinations of phosphorus in fertilizers by spark discharge-assisted laser-induced breakdown spectroscopy |
title_sort |
Determinations of phosphorus in fertilizers by spark discharge-assisted laser-induced breakdown spectroscopy |
author |
Vieira, Alan Lima [UNESP] |
author_facet |
Vieira, Alan Lima [UNESP] Silva, Tiago Varão [UNESP] de Sousa, Felipe Schiavon Inocêncio Senesi, Giorgio Saverio Júnior, Dário Santos Ferreira, Edilene Cristina [UNESP] Neto, José Anchieta Gomes [UNESP] |
author_role |
author |
author2 |
Silva, Tiago Varão [UNESP] de Sousa, Felipe Schiavon Inocêncio Senesi, Giorgio Saverio Júnior, Dário Santos Ferreira, Edilene Cristina [UNESP] Neto, José Anchieta Gomes [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) CNR-Istituto di Nanotecnologia (NANOTEC) – PLasMI Lab |
dc.contributor.author.fl_str_mv |
Vieira, Alan Lima [UNESP] Silva, Tiago Varão [UNESP] de Sousa, Felipe Schiavon Inocêncio Senesi, Giorgio Saverio Júnior, Dário Santos Ferreira, Edilene Cristina [UNESP] Neto, José Anchieta Gomes [UNESP] |
dc.subject.por.fl_str_mv |
Fertilizer analysis LIBS Phosphorus determination Spark discharge |
topic |
Fertilizer analysis LIBS Phosphorus determination Spark discharge |
description |
A spark discharge system was coupled to laser-induced breakdown spectroscopy (SD-LIBS) to improve sensitivity in the determination of P in fertilizers. A LIBS system consisting of a Q-switched Nd:YAG laser operating at 1064 nm and emitting pulses at 50 mJ with a fluence of 70 J cm−2 at the focal point was used. Results of preliminary experiments suggested that the most appropriate wavelength to measure P was the P (I) line at 214.9 nm, which did not show interferences by Fe, Cu and Zn. The electrical discharge was provided by a homemade high-voltage electronic circuit consisting of two cylindrical tungsten electrodes at the optimized output voltage of 4.5 kV, with tips arranged at the optimal distances of 4 mm between them and 2 mm above the sample surface. To minimize the expected matrix effects calibration standards of P2O5 in the range of 4.8 and 33.3% were prepared by mixing various amounts of a phosphate rock reference material (SRM-120c) with a mixture of CaCO3, CaSO4, (NH2)2CO and KCl at a 1:1:1:1 mass ratio. The calibration curves obtained at a 4.5 kV SD-LIBS output voltage showed correlation coefficients ≥0.993, RSD ≤8% and LOQ 5.3% (m/m) P2O5. Data obtained by analyzing commercial samples by the proposed system were in good agreement, at 95% confidence level, with those obtained by using high-resolution continuum-source flame atomic absorption spectroscopy. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-11T17:36:12Z 2018-12-11T17:36:12Z 2018-06-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.microc.2018.03.011 Microchemical Journal, v. 139, p. 322-326. 0026-265X http://hdl.handle.net/11449/179652 10.1016/j.microc.2018.03.011 2-s2.0-85043451770 2-s2.0-85043451770.pdf |
url |
http://dx.doi.org/10.1016/j.microc.2018.03.011 http://hdl.handle.net/11449/179652 |
identifier_str_mv |
Microchemical Journal, v. 139, p. 322-326. 0026-265X 10.1016/j.microc.2018.03.011 2-s2.0-85043451770 2-s2.0-85043451770.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Microchemical Journal |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
322-326 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808128276203307008 |