Abnormal retention of s-triazine herbicides on porous graphitic carbon

Porous graphitic carbon (PGC) is a widely used stationary phase for reversed-phase high-performance liquid chromatography (HPLC) that allows separation of structurally similar compounds retained in mixed form on a flat graphite surface. Such a stationary phase can be used in analytical chemistry to...

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Autores principales:	Grinevich Oksana, Khesina Zoya, Buryak Alexey
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	high-performance liquid chromatography triazine herbicides porous graphitic carbon retention mechanism Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/57bcab6c37234648b7c73b1c4a41ff1e
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spelling	oai:doaj.org-article:57bcab6c37234648b7c73b1c4a41ff1e2021-12-05T14:11:03ZAbnormal retention of s-triazine herbicides on porous graphitic carbon2191-018910.1515/revac-2022-0029https://doaj.org/article/57bcab6c37234648b7c73b1c4a41ff1e2021-11-01T00:00:00Zhttps://doi.org/10.1515/revac-2022-0029https://doaj.org/toc/2191-0189Porous graphitic carbon (PGC) is a widely used stationary phase for reversed-phase high-performance liquid chromatography (HPLC) that allows separation of structurally similar compounds retained in mixed form on a flat graphite surface. Such a stationary phase can be used in analytical chemistry to provide good separation and selectivity in pesticide monitoring. In this article, we studied the chromatographic behavior of five common triazine herbicides (simazine, atrazine, desmetryn, propazine, prometryn) on PGC vis-à-vis octadecyl-functionalized silica gel (ODS). It was found that the herbicides studied have an abnormal elution order on PGC compared to ODS. PGC was also characterized by higher selectivity of analyte separation. This behavior of triazine herbicides on PGC cannot be explained either with the help of existing theory or by mathematical modeling of adsorption processes on graphite. Therefore, we have proposed a possible retention mechanism, explaining the effects observed, due to the shielding of the amino group in the triazine ring by alkyl substituents, which decreases the “polar retention effect” of PGC. Satisfactory separation efficacy was obtained with the proposed analytical method, using convenient UV-detection and without resort to laborious techniques such as HPLC coupled with mass spectrometry.Grinevich OksanaKhesina ZoyaBuryak AlexeyDe Gruyterarticlehigh-performance liquid chromatographytriazine herbicidesporous graphitic carbonretention mechanismChemistryQD1-999ENReviews in Analytical Chemistry, Vol 41, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	high-performance liquid chromatography triazine herbicides porous graphitic carbon retention mechanism Chemistry QD1-999
spellingShingle	high-performance liquid chromatography triazine herbicides porous graphitic carbon retention mechanism Chemistry QD1-999 Grinevich Oksana Khesina Zoya Buryak Alexey Abnormal retention of s-triazine herbicides on porous graphitic carbon
description	Porous graphitic carbon (PGC) is a widely used stationary phase for reversed-phase high-performance liquid chromatography (HPLC) that allows separation of structurally similar compounds retained in mixed form on a flat graphite surface. Such a stationary phase can be used in analytical chemistry to provide good separation and selectivity in pesticide monitoring. In this article, we studied the chromatographic behavior of five common triazine herbicides (simazine, atrazine, desmetryn, propazine, prometryn) on PGC vis-à-vis octadecyl-functionalized silica gel (ODS). It was found that the herbicides studied have an abnormal elution order on PGC compared to ODS. PGC was also characterized by higher selectivity of analyte separation. This behavior of triazine herbicides on PGC cannot be explained either with the help of existing theory or by mathematical modeling of adsorption processes on graphite. Therefore, we have proposed a possible retention mechanism, explaining the effects observed, due to the shielding of the amino group in the triazine ring by alkyl substituents, which decreases the “polar retention effect” of PGC. Satisfactory separation efficacy was obtained with the proposed analytical method, using convenient UV-detection and without resort to laborious techniques such as HPLC coupled with mass spectrometry.
format	article
author	Grinevich Oksana Khesina Zoya Buryak Alexey
author_facet	Grinevich Oksana Khesina Zoya Buryak Alexey
author_sort	Grinevich Oksana
title	Abnormal retention of s-triazine herbicides on porous graphitic carbon
title_short	Abnormal retention of s-triazine herbicides on porous graphitic carbon
title_full	Abnormal retention of s-triazine herbicides on porous graphitic carbon
title_fullStr	Abnormal retention of s-triazine herbicides on porous graphitic carbon
title_full_unstemmed	Abnormal retention of s-triazine herbicides on porous graphitic carbon
title_sort	abnormal retention of s-triazine herbicides on porous graphitic carbon
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/57bcab6c37234648b7c73b1c4a41ff1e
work_keys_str_mv	AT grinevichoksana abnormalretentionofstriazineherbicidesonporousgraphiticcarbon AT khesinazoya abnormalretentionofstriazineherbicidesonporousgraphiticcarbon AT buryakalexey abnormalretentionofstriazineherbicidesonporousgraphiticcarbon
_version_	1718371421792501760

Abnormal retention of s-triazine herbicides on porous graphitic carbon

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