Determination of Phthalate Esters in Water and Coffee by Solid‐Phase Microextraction Using Vinyl Terminated Imidazolium Based Ionic Liquid Grafted on Graphene Oxide Coatings

Tashakkori, Paniz; Erdem, Pelin; Merdıvan, Melek; Bozkurt, Serap Seyhan

doi:10.1002/slct.201803214

Cited by 19 publications

(9 citation statements)

References 39 publications

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“…Moreover, the method's detection limits varied between 0.82 and 6.64 μg kg −1 for the 20 preservatives studied. Similarly, Tashakkori et al ( 2019 ) synthesized a series of ionic liquids grafted onto stainless steel wires, which were previously coated with GO, using a sol-gel technique. The authors used this hybrid material as a sorbent in an on-line DI-SPME-GC-MS approach to determine phthalate esters (PAE) in several samples such as tap water and seawater and coffee.…”

Section: Anchored Graphene-based Materialsmentioning

confidence: 99%

The Current Role of Graphene-Based Nanomaterials in the Sample Preparation Arena

et al. 2020

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Since its discovery in 2004 by Novoselov et al., graphene has attracted increasing attention in the scientific community due to its excellent physical and chemical properties, such as thermal/mechanical resistance, electronic stability, high Young's modulus, and fast mobility of charged atoms. In addition, other remarkable characteristics support its use in analytical chemistry, especially as sorbent. For these reasons, graphene-based materials (GBMs) have been used as a promising material in sample preparation. Graphene and graphene oxide, owing to their excellent physical and chemical properties as a large surface area, good mechanical strength, thermal stability, and delocalized π-electrons, are ideal sorbents, especially for molecules containing aromatic rings. They have been used in several sample preparation techniques such as solid-phase extraction (SPE), stir bar sorptive extraction (SBSE), magnetic solid-phase extraction (MSPE), as well as in miniaturized modes as solid-phase microextraction (SPME) in their different configurations. However, the reduced size and weight of graphene sheets can limit their use since they commonly aggregate to each other, causing clogging in high-pressure extractive devices. One way to overcome it and other drawbacks consists of covalently attaching the graphene sheets to support materials (e.g., silica, polymers, and magnetically modified supports). Also, graphene-based materials can be further chemically modified to favor some interactions with specific analytes, resulting in more efficient hybrid sorbents with higher selectivity for specific chemical classes. As a result of this wide variety of graphene-based sorbents, several studies have shown the current potential of applying GBMs in different fields such as food, biological, pharmaceutical, and environmental applications. Within such a context, this review will focus on the last five years of achievements in graphene-based materials for sample preparation techniques highlighting their synthesis, chemical structure, and potential application for the extraction of target analytes in different complex matrices.

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Section: Anchored Graphene-based Materialsmentioning

confidence: 99%

The Current Role of Graphene-Based Nanomaterials in the Sample Preparation Arena

et al. 2020

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“…We dipped the G.O. coated fiber vertically into the 0.02 g [APMIM][NTf2], which was synthesized according to the previous methods given in the literature (18,33), in 5 mL of methanol for 2 h at room temperature. This step was repeated in sextuplicate to increase the thickness of the fiber coating.…”

Section: Preparation Of the Fibermentioning

confidence: 99%

“…Ionic liquids (I.L.s), being potential environmentally friendly solvents, have a great attraction in separation science due to low volatility, high viscosity, excellent thermal stability, and high polarities (14). Besides, its use as stationary phase in liquid chromatography, gas chromatography, and capillary chromatography, and extraction material in micro liquid extraction techniques, I.L.s have been preferred in SPE and SPME as sorbent and coating material both alone and grafted on different supports such as graphene oxide and carbon nanotubes to improve extraction efficiency and stability (15)(16)(17)(18).…”

Section: Introductionmentioning

confidence: 99%

“…References concerning the SPME-GC-MS method using only commercial fibers are available for some polyphenolic compounds such as resveratrol, gallic acid, caffeic acid, p-coumaric acid, ferulic acid, syringic acid, and protocatechuic acid (28)(29)(30). SPME fibers coated with graphene oxide modified with ionic liquids having vinyl-and benzylimidazolium by sol-gel technique have been performed and used for extraction and determination of phthalate esters and polyaromatic hydrocarbons in water and coffee samples in our previous studies (18,32). In this work, the extraction performance of coating possessing graphene oxide modified with aminoterminated methylimidazolium cation was evaluated for the analysis of twelve P.C.s (syringic acid, protocatechuic acid, cinnamic acid, p-coumaric acid, sinapinic acid, ferulic acid, caffeic acid, quercetin, kaempferol, chlorogenic acid, resveratrol, and gallic acid) in wine using direct immersion-SPME coupled with GC-MS.…”

Section: Introductionmentioning

confidence: 99%

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Graphene Oxide-Ionic Liquid Used As Solid-Phase Microextraction Coating For Polyphenolic Compounds' Extraction And Determination With GC-MS After On-Fiber Derivatization In Wine

Tashakkori

Tağaç

Merdıvan

2020

Journal of the Turkish Chemical Society Section A: Chemistry

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We describe the use of a home-made fiber coated by graphene oxide modified by an ionic liquid having methylimidazolium cation with an amino-functional group for the extraction of polyphenolic compounds (P.C.s). We then performed the determination by gas chromatography coupled with mass spectrometry after on-fiber derivatization. The authors optimized the main parameters influencing the extraction and derivatization processes. The on-fiber derivatization was employed within 15 min at 60 º C using 20 µL of trimethylsilyl reagents. Under the optimized conditions, the calibration curves for 12 P.C.s were linear from 0.1 to 1000 µg/L, and the detection limits were between 0.02 and 0.1 µg/L. We determined the single fiber repeatability obtained for all calibration points and the fiber to fiber reproducibility for 100 µg/L to be < 14.82% and < 5.87%, respectively. The extraction efficacy of the home-made fiber due to high intermolecular and electrostatic attractions was much better than the commercial fibers. We successfully applied the method to the analysis of P.C.s in wine samples with the recoveries from 72.8 to 99.9%.

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“…Moreover, the method's detection limits varied between 0.82 and 6.64 µg kg −1 for the 20 preservatives studied. Similarly, Tashakkori et al (2019) synthesized a series of ionic liquids grafted onto stainless steel wires, which were previously coated with GO, using a solgel technique. The authors used this hybrid material as a sorbent in an on-line DI-SPME-GC-MS approach to determine phthalate esters (PAE) in several samples such as tap water and seawater and coffee.…”

Section: Ionic Liquidsmentioning

confidence: 99%

Desenvolvimento de novos materiais e dispositivos para preparo miniaturizado de amostras e seu acoplamento >i<on-line>/i< com cromatografia líquida de alta eficiência

Silva¹

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Esta tese de doutorado é orientada a resultados relacionados ao desenvolvimento da etapa de preparo de amostras, os quais são apresentados em forma de quatro artigos, um artigo por capítulo. As isoflavonas formam uma importante subclasse dos fitoestrógenos. Compostos presentes em todo o reino vegetal, mais facilmente em leguminosas como soja, feijão, grão de bico e sementes de girassol, estão diariamente presentes em nossa alimentação. A ação antioxidante e propriedades que previnem inflamações, aterosclerose, trombose, osteoporose, infecções virais, tumores e doenças cardiovasculares, fazem com que as isoflavonas sejam associadas a inúmeros benefícios à saúde humana, fatores que despertaram o interesse da comunidade científica, ocasionando um expressivo aumento no número de publicações relacionadas a estes compostos nas últimas duas décadas. Ainda que micro técnicas de preparo de amostra como a SPME e a MEPS já estejam bem desenvolvidas, o uso de técnicas clássicas de preparo de amostra ainda prevalece e é o mais utilizado. O uso de micro técnicas ainda é escasso limitando-se, principalmente, à trabalhos de desenvolvimento analítico. Foi sintetizada um fase extratora que consiste em aminopropil silica recoberta com nanofolhas de grafeno e funcionalizadas com βciclodextrina e aplicada em micro extração por sorvente empacotado (MEPS) com a finalidade de desenvolver uma metodologia simples, fácil, rápida e de baixo custo para análises de isoflavonas em alimentos líquidos vendidos comercialmente. Nesta etapa do trabalho foi constatada a seletividade da fase extratora proposta por meio de experimentos que avaliaram a influência do efeito de matriz. Uma nova abordagem para o acoplamento on-line entre micro extração em fase sólida (SPME) e cromatografia líquida foi desenvolvida. A fase extratora desenvolvida foi aplicada à técnica de extração chamada needle-sleeve SPME e um método analítico foi desenvolvido, automatizado e acoplado a cromatografia líquida de alta eficiência. Além da hifenização do SPME on-line, esta abordagem de extração permitiu tratar alguns problemas conhecidos como o entupimento do sistema e/ou da coluna analítica, onde em uma abordagem tipo column switching, como in-tube SPME, costuma ocorrer. O efeito dos principais parâmetros relacionados à extração e o desempenho do método online SPME-LC automatizado desenvolvido, foram estudados e o método se mostrou uma nova estratégia analítica sensível, confiável e direta para a determinação de compostos orgânicos em amostras complexas.

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Determination of Phthalate Esters in Water and Coffee by Solid‐Phase Microextraction Using Vinyl Terminated Imidazolium Based Ionic Liquid Grafted on Graphene Oxide Coatings

Cited by 19 publications

References 39 publications

The Current Role of Graphene-Based Nanomaterials in the Sample Preparation Arena

The Current Role of Graphene-Based Nanomaterials in the Sample Preparation Arena

Graphene Oxide-Ionic Liquid Used As Solid-Phase Microextraction Coating For Polyphenolic Compounds' Extraction And Determination With GC-MS After On-Fiber Derivatization In Wine

Desenvolvimento de novos materiais e dispositivos para preparo miniaturizado de amostras e seu acoplamento >i<on-line>/i< com cromatografia líquida de alta eficiência

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