Absorbance detector for high performance liquid chromatography based on a deep-UV light-emitting diode at 235 nm

Detalhes bibliográficos
Autor(a) principal: da Silveira Petruci, João Flavio [UNESP]
Data de Publicação: 2017
Outros Autores: Liebetanz, Michael G., Cardoso, Arnaldo Alves [UNESP], Hauser, Peter C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.chroma.2017.07.029
http://hdl.handle.net/11449/179025
Resumo: In this communication, we describe a flow-through optical absorption detector for HPLC using for the first time a deep-UV light-emitting diode with an emission band at 235 nm as light source. The detector is also comprised of a UV-sensitive photodiode positioned to enable measurement of radiation through a flow-through cuvette with round aperture of 1 mm diameter and optical path length of 10 mm, and a second one positioned as reference photodiode; a beam splitter and a power supply. The absorbance was measured and related to the analyte concentration by emulating the Lambert-Beer law with a log-ratio amplifier circuitry. This detector showed noise levels of 0.30 mAU, which is comparable with our previous LED-based detectors employing LEDs at 280 and 255 nm. The detector was coupled to a HPLC system and successfully evaluated for the determination of the anti-diabetic drugs pioglitazone and glimepiride in an isocratic separation and the benzodiazepines flurazepam, oxazepam and clobazam in a gradient elution. Good linearities (r > 0.99), a precision better than 0.85% and limits of detection at sub-ppm levels were achieved.
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spelling Absorbance detector for high performance liquid chromatography based on a deep-UV light-emitting diode at 235 nmAbsorbance detectionDeep-UVHPLCLight-emitting diodeIn this communication, we describe a flow-through optical absorption detector for HPLC using for the first time a deep-UV light-emitting diode with an emission band at 235 nm as light source. The detector is also comprised of a UV-sensitive photodiode positioned to enable measurement of radiation through a flow-through cuvette with round aperture of 1 mm diameter and optical path length of 10 mm, and a second one positioned as reference photodiode; a beam splitter and a power supply. The absorbance was measured and related to the analyte concentration by emulating the Lambert-Beer law with a log-ratio amplifier circuitry. This detector showed noise levels of 0.30 mAU, which is comparable with our previous LED-based detectors employing LEDs at 280 and 255 nm. The detector was coupled to a HPLC system and successfully evaluated for the determination of the anti-diabetic drugs pioglitazone and glimepiride in an isocratic separation and the benzodiazepines flurazepam, oxazepam and clobazam in a gradient elution. Good linearities (r > 0.99), a precision better than 0.85% and limits of detection at sub-ppm levels were achieved.Department of Chemistry University of Basel, Spitalstrasse 51São Paulo State University (UNESP) Department of Analytical ChemistrySão Paulo State University (UNESP) Department of Analytical ChemistryUniversity of BaselUniversidade Estadual Paulista (Unesp)da Silveira Petruci, João Flavio [UNESP]Liebetanz, Michael G.Cardoso, Arnaldo Alves [UNESP]Hauser, Peter C.2018-12-11T17:33:13Z2018-12-11T17:33:13Z2017-08-25info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article143-146application/pdfhttp://dx.doi.org/10.1016/j.chroma.2017.07.029Journal of Chromatography A, v. 1512, p. 143-146.1873-37780021-9673http://hdl.handle.net/11449/17902510.1016/j.chroma.2017.07.0292-s2.0-850236475512-s2.0-85023647551.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Chromatography A1,378info:eu-repo/semantics/openAccess2023-12-25T06:22:58Zoai:repositorio.unesp.br:11449/179025Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:16:30.247415Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Absorbance detector for high performance liquid chromatography based on a deep-UV light-emitting diode at 235 nm
title Absorbance detector for high performance liquid chromatography based on a deep-UV light-emitting diode at 235 nm
spellingShingle Absorbance detector for high performance liquid chromatography based on a deep-UV light-emitting diode at 235 nm
da Silveira Petruci, João Flavio [UNESP]
Absorbance detection
Deep-UV
HPLC
Light-emitting diode
title_short Absorbance detector for high performance liquid chromatography based on a deep-UV light-emitting diode at 235 nm
title_full Absorbance detector for high performance liquid chromatography based on a deep-UV light-emitting diode at 235 nm
title_fullStr Absorbance detector for high performance liquid chromatography based on a deep-UV light-emitting diode at 235 nm
title_full_unstemmed Absorbance detector for high performance liquid chromatography based on a deep-UV light-emitting diode at 235 nm
title_sort Absorbance detector for high performance liquid chromatography based on a deep-UV light-emitting diode at 235 nm
author da Silveira Petruci, João Flavio [UNESP]
author_facet da Silveira Petruci, João Flavio [UNESP]
Liebetanz, Michael G.
Cardoso, Arnaldo Alves [UNESP]
Hauser, Peter C.
author_role author
author2 Liebetanz, Michael G.
Cardoso, Arnaldo Alves [UNESP]
Hauser, Peter C.
author2_role author
author
author
dc.contributor.none.fl_str_mv University of Basel
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv da Silveira Petruci, João Flavio [UNESP]
Liebetanz, Michael G.
Cardoso, Arnaldo Alves [UNESP]
Hauser, Peter C.
dc.subject.por.fl_str_mv Absorbance detection
Deep-UV
HPLC
Light-emitting diode
topic Absorbance detection
Deep-UV
HPLC
Light-emitting diode
description In this communication, we describe a flow-through optical absorption detector for HPLC using for the first time a deep-UV light-emitting diode with an emission band at 235 nm as light source. The detector is also comprised of a UV-sensitive photodiode positioned to enable measurement of radiation through a flow-through cuvette with round aperture of 1 mm diameter and optical path length of 10 mm, and a second one positioned as reference photodiode; a beam splitter and a power supply. The absorbance was measured and related to the analyte concentration by emulating the Lambert-Beer law with a log-ratio amplifier circuitry. This detector showed noise levels of 0.30 mAU, which is comparable with our previous LED-based detectors employing LEDs at 280 and 255 nm. The detector was coupled to a HPLC system and successfully evaluated for the determination of the anti-diabetic drugs pioglitazone and glimepiride in an isocratic separation and the benzodiazepines flurazepam, oxazepam and clobazam in a gradient elution. Good linearities (r > 0.99), a precision better than 0.85% and limits of detection at sub-ppm levels were achieved.
publishDate 2017
dc.date.none.fl_str_mv 2017-08-25
2018-12-11T17:33:13Z
2018-12-11T17:33:13Z
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.chroma.2017.07.029
Journal of Chromatography A, v. 1512, p. 143-146.
1873-3778
0021-9673
http://hdl.handle.net/11449/179025
10.1016/j.chroma.2017.07.029
2-s2.0-85023647551
2-s2.0-85023647551.pdf
url http://dx.doi.org/10.1016/j.chroma.2017.07.029
http://hdl.handle.net/11449/179025
identifier_str_mv Journal of Chromatography A, v. 1512, p. 143-146.
1873-3778
0021-9673
10.1016/j.chroma.2017.07.029
2-s2.0-85023647551
2-s2.0-85023647551.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of Chromatography A
1,378
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 143-146
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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