Absorbance detector for high performance liquid chromatography based on a deep-UV light-emitting diode at 235 nm
Autor(a) principal: | |
---|---|
Data de Publicação: | 2017 |
Outros Autores: | , , |
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. |
id |
UNSP_ee41223e5a614a8c55ec36f178bd8968 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/179025 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
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 |
|
_version_ |
1808129303822467072 |