Nanomaterials as tools in chromatographic methods

Castillo-García, M.L.; Aguilar-Caballos, M.P.; Gómez‐Hens, A.

doi:10.1016/j.trac.2016.06.019

Cited by 44 publications

(11 citation statements)

References 70 publications

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“…As can be observed, MIPs play an important role in the preparation of samples for chromatographic analysis, as shown by the work of Castillo-García et al (2016) in which a survey from 2011 to 2015 found that 17.2% of the published papers used MIPs for sample preparation. This demonstrates the versatility, applicability and importance of these materials in preparation of samples for chromatographic analysis.…”

Section: Simulated Sample Analysis and Real Samplementioning

confidence: 94%

Solid phase extraction using molecular imprinting polymers (MISPE) for the determination of estrogens in surface water by HPLC

et al. 2017

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Estrogens are emerging pollutants and traditional sewage treatments unable to remove them. They are harmful to human health and to the environment. It is therefore important to evaluate the presence and concentration of estrogens in water bodies and environmental matrices. This work presents the development and application of a methodology for the determination of E1, E3, EE2 and E2 in surface waters using solid phase extraction with molecular imprinting polymers (MISPE) followed by identification and quantification by HPLC-DAD. Acetonitrile and water deionized acidified with phosphoric acid pH 3 (1:1, v/v), a flow rate of 1.0 ml min and the method was satisfactory for specificity and selectivity tests using caffeine, which is often found in water bodies receiving effluent, and DES, an estrogen used in the treatment of prostate cancer. Selected samples underwent cleanup and pre-concentration treatments using solid phase extraction with commercial phase (C18) and molecularly imprinted polymers (MISPE). The analysis of MISPE extracts indicate that it is possible to obtain results with greater sensitivity and precision for analyses of complex environmental matrices, demonstrating that the developed method can be applied in complex environmental matrices.Keywords: emerging pollutants, endocrine disruptors, environmental matrices.Extração em fase sólida utilizando polímeros de impressão molecular (MISPE) para a determinação de estrógenos em águas superficiais por HPLC RESUMOEstrogênios são poluentes emergentes e os tratamentos de esgoto tradicionais não são capazes de removê-los. São prejudiciais à saúde humana e ao ambiente. Portanto, torna-se 381 Solid phase extraction using molecular imprinting polymers (MISPE)… Rev. Ambient. Água vol. 12 n. 3 Taubaté -May / Jun. 2017 importante avaliar a presença e concentração dessas substâncias em corpos hídricos e matrizes ambientais. No presente trabalho, apresenta-se o desenvolvimento e aplicação de uma metodologia para a determinação de E1, E3, EE2, E2 em águas superficiais utilizando a extração em fase sólida com polímeros de impressão molecular (MISPE) seguida da identificação e quantificação via HPLC-DAD. A fase móvel empregada foi acetonitrila e água acidificada, com ácido fosfórico, pH 3, (1:1, v/v), vazão 1,0 mL min e o método mostrou-se satisfatório para testes de especificidade e seletividade usando cafeína encontrada em corpos hídricos que recebem efluentes, e DES, estrogênio utilizado em tratamento de câncer de próstata. Amostras selecionadas foram submetidas a clean-up e pré-concentração utilizando extração em fase sólida com fase comercial (C18) e polímeros de impressão molecular (MISPE). Os extratos MISPE analisados indicaram que é possível obter resultados com maior sensibilidade e precisão para análises de matrizes ambientais complexas; mostrando que o método desenvolvido pode ser aplicado em matrizes ambientais complexas.Palavras-chave: disruptores endócrinos, matrizes ambientais, poluentes emergentes.

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Section: Simulated Sample Analysis and Real Samplementioning

confidence: 94%

Solid phase extraction using molecular imprinting polymers (MISPE) for the determination of estrogens in surface water by HPLC

et al. 2017

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“…Apart from that, the improvements that MPs brought for dispersive sample preparation procedures making the phase separation easier have been a key factor for an increasing in the number of applications with synthesized MPs. In general, these novel MPs are based on graphene, metal organic framework, multiwalled carbon nanotubes, and polymeric phases . The synthesized sorbents can be applied for extraction, enrichment, and separation of analytes in complex matrix including food .…”

Section: Instrumentationmentioning

confidence: 99%

“…In general, these novel MPs are based on graphene, metal organic framework, multiwalled carbon nanotubes, and polymeric phases . The synthesized sorbents can be applied for extraction, enrichment, and separation of analytes in complex matrix including food .…”

Section: Instrumentationmentioning

confidence: 99%

Recent trends in sorption‐based sample preparation and liquid chromatography techniques for food analysis

2018

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The accelerated rising of the world's population increased the consumption of food, thus demanding more rigors in the control of residue and contaminants in food-based products marketed for human consumption. In view of the complexity of most food matrices, including fruits, vegetables, different types of meat, beverages, among others, a sample preparation step is important to provide more reliable results when combined with HPLC separations. An adequate sample preparation step before the chromatographic analysis is mandatory in obtaining higher precision and accuracy in order to improve the extraction of the target analytes, one of the priorities in analytical chemistry. The recent discovery of new materials such as ionic liquids, graphene-derived materials, molecularly imprinted polymers, restricted access media, magnetic nanoparticles, and carbonaceous nanomaterials, provided high sensitivity and selectivity results in an extensive variety of applications. These materials, as well as their several possible combinations, have been demonstrated to be highly appropriate for the extraction of different analytes in complex samples such as food products. The main characteristics and application of these new materials in food analysis will be presented and discussed in this paper. Another topic discussed in this review covers the main advantages and limitations of sample preparation microtechniques, as well as their off-line and on-line combination with HPLC for food analysis.

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“…8,9 Their high surface to volume ratio, a direct consequence of the nanometric size, guarantees a high extraction rate if aggregation is not an issue. 10 Besides, the great variety of NPs, covering different interaction chemistries, and their potential functionalization increases even more the scope their applicability.…”

Section: -7mentioning

confidence: 99%

Silica nanoparticles–nylon 6 composites: synthesis, characterization and potential use as sorbent

2017

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Composite materials based on the combination of nanoparticles (NPs) and polymers have attracted much attention in recent years thanks to their positive characteristics. In this article an easy, cheap and green procedure for the synthesis of silica nanoparticles-nylon 6 composites is proposed. Several materials comprising different NPs-polymer ratios have been synthesized and characterized. The evaluation of their extraction performances indicated that the inclusion of NPs into the polymeric network increases their superficial area, boosting their sorbent capacity, because the NPs modify the normal stacking of the polymeric chains. Among the tested composite materials, the best one has been applied for the dispersive micro-solid phase extraction of selected estrogens (estrone, b-estradiol and estriol) from aqueous samples as a model analytical problem. The approach allows the determination of the target compounds by LC-MS/MS at the low mg L À1 range with acceptable precision (better than 13.9%, expressed as relative standard deviation). Finally, the potential use of the composite for the isolation of the targets from more complex samples has been outlined.

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Nanomaterials as tools in chromatographic methods

Cited by 44 publications

References 70 publications

Solid phase extraction using molecular imprinting polymers (MISPE) for the determination of estrogens in surface water by HPLC

Solid phase extraction using molecular imprinting polymers (MISPE) for the determination of estrogens in surface water by HPLC

Recent trends in sorption‐based sample preparation and liquid chromatography techniques for food analysis

Silica nanoparticles–nylon 6 composites: synthesis, characterization and potential use as sorbent

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