Uçucu Bileşiklerin Belirlenmesi için Metal Oksit Bazlı Katı Faz Mikroekstraksiyon Elyafının Geliştirilmesi

Bildiriler > Özet Bildiri · 2025

Yazarlar: Levent PELİT, Berfu Yığrık

31st International Symposium on Electro- and Liquid-Phase Separation Techniques, Türkiye, Ankara, Uluslararası, Poster, Özet Bildiri, 2025-2025, ss 14-14

Özet

<p>According&nbsp;to&nbsp;the&nbsp;World&nbsp;Health&nbsp;Organization&nbsp;(WHO),&nbsp;volatile&nbsp;organic&nbsp;compounds&nbsp;(VOCs)&nbsp;are&nbsp;carbon-&nbsp;and&nbsp;hydrogencontaining</p><p>compounds&nbsp;with&nbsp;an&nbsp;atmospheric&nbsp;pressure&nbsp;of&nbsp;101.32&nbsp;kPa&nbsp;and&nbsp;a&nbsp;boiling&nbsp;point&nbsp;between&nbsp;50&nbsp;and&nbsp;250&nbsp;°C.&nbsp;Humans</p><p>are&nbsp;exposed&nbsp;to&nbsp;VOCs&nbsp;in&nbsp;various&nbsp;aspects&nbsp;of&nbsp;their&nbsp;daily&nbsp;lives.&nbsp;Due&nbsp;to&nbsp;their&nbsp;high&nbsp;vapour&nbsp;pressure&nbsp;and&nbsp;low&nbsp;boiling&nbsp;point,&nbsp;these</p><p>substances&nbsp;evaporate&nbsp;rapidly&nbsp;and&nbsp;are&nbsp;released&nbsp;into&nbsp;the&nbsp;ambient&nbsp;air&nbsp;through&nbsp;various&nbsp;activities.&nbsp;VOCs&nbsp;are&nbsp;released&nbsp;from</p><p>both&nbsp;natural&nbsp;and&nbsp;man-made&nbsp;sources.&nbsp;Most&nbsp;studies&nbsp;show&nbsp;that&nbsp;VOC&nbsp;concentrations&nbsp;in&nbsp;indoor&nbsp;environments&nbsp;are&nbsp;significantly</p><p>higher&nbsp;than&nbsp;in&nbsp;outdoor&nbsp;atmospheres&nbsp;[1].&nbsp;Furthermore,&nbsp;it&nbsp;has&nbsp;been&nbsp;demonstrated&nbsp;that&nbsp;certain&nbsp;of&nbsp;these&nbsp;substances&nbsp;can&nbsp;have</p><p>detrimental&nbsp;effects&nbsp;on&nbsp;human&nbsp;health.&nbsp;Therefore,&nbsp;their&nbsp;levels&nbsp;must&nbsp;be&nbsp;effectively&nbsp;monitored&nbsp;in&nbsp;indoor&nbsp;environments.</p><p>Various&nbsp;methods&nbsp;have&nbsp;already&nbsp;been&nbsp;developed&nbsp;to&nbsp;determine&nbsp;VOCs&nbsp;in&nbsp;gas&nbsp;samples.&nbsp;However,&nbsp;most&nbsp;of&nbsp;these&nbsp;methods&nbsp;are</p><p>time-consuming&nbsp;and&nbsp;require&nbsp;expensive&nbsp;instruments&nbsp;[2].&nbsp;Therefore,&nbsp;there&nbsp;is&nbsp;a&nbsp;need&nbsp;for&nbsp;the&nbsp;development&nbsp;of&nbsp;fast,&nbsp;cost-effective</p><p>and&nbsp;easy&nbsp;methods&nbsp;for&nbsp;the&nbsp;effective&nbsp;analysis&nbsp;of&nbsp;VOCs&nbsp;in&nbsp;indoor&nbsp;environments.&nbsp;Solid&nbsp;phase&nbsp;microextraction&nbsp;(SPME),&nbsp;which</p><p>was&nbsp;introduced&nbsp;by&nbsp;Arthur&nbsp;and&nbsp;Pawliszyn&nbsp;in&nbsp;1990,&nbsp;offers&nbsp;an&nbsp;efficient,&nbsp;environmentally&nbsp;friendly&nbsp;solution&nbsp;by&nbsp;combining</p><p>sampling,&nbsp;extraction,&nbsp;preconcentration&nbsp;and&nbsp;sample&nbsp;introduction&nbsp;in&nbsp;a&nbsp;single&nbsp;step&nbsp;[3].&nbsp;SPME&nbsp;fibers&nbsp;are&nbsp;widely&nbsp;used&nbsp;due&nbsp;to</p><p>their&nbsp;miniaturised&nbsp;format,&nbsp;automation&nbsp;compatibility&nbsp;and&nbsp;operational&nbsp;simplicity.&nbsp;They&nbsp;traditionally&nbsp;utilise&nbsp;polymeric&nbsp;(e.g.</p><p>polydimethylsiloxane&nbsp;or&nbsp;polyacrylate)&nbsp;or&nbsp;carbon-based&nbsp;(e.g.&nbsp;graphene&nbsp;or&nbsp;carbon&nbsp;nanotubes)&nbsp;coatings.&nbsp;However,&nbsp;recent</p><p>studies&nbsp;have&nbsp;demonstrated&nbsp;that&nbsp;metal&nbsp;oxides&nbsp;such&nbsp;as&nbsp;titanium&nbsp;dioxide&nbsp;(TiO₂),&nbsp;lead&nbsp;oxide&nbsp;(PbO)&nbsp;and&nbsp;ruthenium&nbsp;dioxide</p><p>(RuO₂)&nbsp;have&nbsp;superior&nbsp;properties&nbsp;for&nbsp;use&nbsp;in&nbsp;SPME&nbsp;coatings.&nbsp;These&nbsp;properties&nbsp;include&nbsp;high&nbsp;thermal&nbsp;stability,&nbsp;mechanical</p><p>robustness,&nbsp;strong&nbsp;adsorption&nbsp;capacity&nbsp;and&nbsp;a&nbsp;large&nbsp;surface-to-volume&nbsp;ratio.&nbsp;To&nbsp;further&nbsp;enhance&nbsp;their&nbsp;performance,&nbsp;these</p><p>metal&nbsp;oxides&nbsp;can&nbsp;be&nbsp;engineered&nbsp;into&nbsp;porous&nbsp;structures,&nbsp;which&nbsp;significantly&nbsp;increases&nbsp;the&nbsp;surface&nbsp;area&nbsp;available&nbsp;for&nbsp;analyte</p><p>interaction,&nbsp;an&nbsp;essential&nbsp;feature,&nbsp;given&nbsp;that&nbsp;VOC&nbsp;adsorption&nbsp;predominantly&nbsp;occurs&nbsp;on&nbsp;the&nbsp;surface&nbsp;of&nbsp;the&nbsp;nanoparticles.</p><p>In&nbsp;this&nbsp;study,&nbsp;SPME&nbsp;fibres&nbsp;were&nbsp;prepared&nbsp;by&nbsp;coating&nbsp;metal&nbsp;oxide&nbsp;coatings&nbsp;based&nbsp;on&nbsp;RuO₂,&nbsp;IrO₂&nbsp;and&nbsp;TiO₂&nbsp;onto&nbsp;stainless</p><p>steel&nbsp;wires.&nbsp;These&nbsp;coatings&nbsp;were&nbsp;prepared&nbsp;using&nbsp;the&nbsp;methodologies&nbsp;outlined&nbsp;in&nbsp;the&nbsp;relevant&nbsp;literature&nbsp;[4,5,6].&nbsp;To&nbsp;this&nbsp;end,</p><p>316-type&nbsp;stainless&nbsp;steel&nbsp;wires&nbsp;were&nbsp;treated&nbsp;in&nbsp;an&nbsp;ultrasonic&nbsp;bath&nbsp;with&nbsp;acetone,&nbsp;hydrochloric&nbsp;acid,&nbsp;water,&nbsp;and&nbsp;ethanol,</p><p>respectively.&nbsp;Then,&nbsp;a&nbsp;cocktail&nbsp;containing&nbsp;each&nbsp;Ru(III),&nbsp;Ti(IV)&nbsp;and&nbsp;Ir(III)&nbsp;ions&nbsp;was&nbsp;prepared&nbsp;in&nbsp;the&nbsp;presence&nbsp;of&nbsp;an&nbsp;HCl&nbsp;and</p><p>isopropyl&nbsp;alcohol&nbsp;mixture.&nbsp;The&nbsp;wires&nbsp;were&nbsp;then&nbsp;coated&nbsp;by&nbsp;dipping&nbsp;them&nbsp;into&nbsp;the&nbsp;coating&nbsp;solutions&nbsp;using&nbsp;the&nbsp;deep&nbsp;coating</p><p>method.&nbsp;The&nbsp;wires&nbsp;were&nbsp;then&nbsp;exposed&nbsp;to&nbsp;a&nbsp;drying&nbsp;process&nbsp;at&nbsp;110&nbsp;°C&nbsp;in&nbsp;an&nbsp;oven,&nbsp;followed&nbsp;by&nbsp;a&nbsp;calcination&nbsp;step&nbsp;at&nbsp;450&nbsp;°C.</p><p>Subsequently,&nbsp;the&nbsp;coated&nbsp;wires&nbsp;were&nbsp;attached&nbsp;in&nbsp;the&nbsp;SPME&nbsp;body&nbsp;to&nbsp;form&nbsp;fibres.&nbsp;The&nbsp;surface&nbsp;morphologies&nbsp;of&nbsp;each&nbsp;fiber</p><p>were&nbsp;revealed&nbsp;by&nbsp;scanning&nbsp;electron&nbsp;microscopy&nbsp;(SEM).&nbsp;Finally,&nbsp;the&nbsp;extraction&nbsp;performance&nbsp;of&nbsp;the&nbsp;prepared&nbsp;SPME&nbsp;fibres</p><p>was&nbsp;compared&nbsp;for&nbsp;some&nbsp;VOCs.</p>

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