Determination of trace 2,4-dinitrophenol in surface water samples based on hydrophilic molecularly imprinted polymers/nickel fiber electrode

Ji, Tao; Xia, Huan; Niu, Jiwei; Zhou, Yusun; Dai, Qing; Hao, Qiaolin; Zhou, Yikai; Mei, Surong

doi:10.1016/j.bios.2011.05.001

Cited by 44 publications

(23 citation statements)

References 28 publications

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“…One of its derivatives, 2,4-dinitrophenol (2,4-DNP), has been determined in surface water samples following an electrochemical method using MIPs, a Ni fiber as catalytic element and the analyte as template. (11) For the preparation of hydrophilic MIPs, template molecules and functional monomer were dispersed in acetonitrile. Then, prohydrophilic comonomer, cross-linker, and initiator were added to the mixture.…”

Section: Molecularly Imprinted Polymers-based Extraction Proceduresmentioning

confidence: 99%

Selective Nanoparticles in Microextraction

Ríos-Gómez

Lasarte‐Aragonés

Cárdenas

et al. 2016

Encyclopedia of Analytical Chemistry

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Sorption capacity is a critical issue in microextraction techniques where the amount of sorbent is reduced to the low milligram range and even lower. In this context, the use of sorbents with a high superficial area is really desirable. Nanoparticles (NPs) fulfill this main requirement while, at the same time, provide the analyst with a wide variety of interaction chemistries that can be easily selected depending on the analytical problem under study. In addition, certain NPs present especial properties (e.g. superparamagnetism) that make them so attractive in the microextraction context. Focusing on sorption capacity is meaningless when complex samples, the usual situation in Bioanalysis, are processed as matrix components may overload the sorbent avoiding the extraction of the target analytes. In this scenario, selectivity then becomes a critical variable of concern. This article discusses the role of selectivity in microextraction and provides a general overview of the main coatings used to boost the selectivity of NPs. In particular, this article describes the use of two groups of coatings as selectivity enhancers. On the one hand, the use of synthetic polymers including molecularly imprinted polymers (MIPs) and restricted access materials (RAMs) is a well‐established alternative in analytical sciences. On the other hand, biopolymers, such as antibodies and aptamers, exploit biorecognition that is by far the most selective interaction. Both alternatives are described in detail in this article.

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Section: Molecularly Imprinted Polymers-based Extraction Proceduresmentioning

confidence: 99%

Selective Nanoparticles in Microextraction

Ríos-Gómez

Lasarte‐Aragonés

Cárdenas

et al. 2016

Encyclopedia of Analytical Chemistry

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“…During the test the contaminated samples were identified quickly (81 s) with a cut-off level of 700 μg·L −1 for ethylbenzene, which is the maximum level established by US Environmental Protection Agency [245]. In recent times, the possibility to determine 2,4-dinitrophenol in water samples by using an electrochemical sensor based on an hydrophilic imprinted polymer was demonstrated [246]. The novelty of the work is represented by the presence of a hydrophilic imprinted polymer that could enhance the accessibility of the target species to the imprinted cavities and thus improve the selectivity of the MIPs in a water medium.…”

Section: Biosensorsmentioning

confidence: 99%

Bio-Mimetic Sensors Based on Molecularly Imprinted Membranes

Algieri

Drioli

Guzzo

et al. 2014

Sensors

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An important challenge for scientific research is the production of artificial systems able to mimic the recognition mechanisms occurring at the molecular level in living systems. A valid contribution in this direction resulted from the development of molecular imprinting. By means of this technology, selective molecular recognition sites are introduced in a polymer, thus conferring it bio-mimetic properties. The potential applications of these systems include affinity separations, medical diagnostics, drug delivery, catalysis, etc. Recently, bio-sensing systems using molecularly imprinted membranes, a special form of imprinted polymers, have received the attention of scientists in various fields. In these systems imprinted membranes are used as bio-mimetic recognition elements which are integrated with a transducer component. The direct and rapid determination of an interaction between the recognition element and the target analyte (template) was an encouraging factor for the development of such systems as alternatives to traditional bio-assay methods. Due to their high stability, sensitivity and specificity, bio-mimetic sensors-based membranes are used for environmental, food, and clinical uses. This review deals with the development of molecularly imprinted polymers and their different preparation methods. Referring to the last decades, the application of these membranes as bio-mimetic sensor devices will be also reported.

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“…• OH, CO [51]); and (iv) 2,4-dinitrophenol (24DNP), used in several industrial applications or formed as secondary pollutant [52]. 24DNP is mostly transformed by direct photolysis [27].…”

Section: Model Application To Fluctuating Water Environmentsmentioning

confidence: 99%