Carbon nanotubes as analytical tools in capillary electromigration methods

Moreno, Mónica Cárdenas; Arribas, Alberto Sánchez; Bermejo, Esperanza; Zapardiel, Antonio; Chicharro, Manuel

doi:10.1016/j.apmt.2017.09.008

Cited by 11 publications

(3 citation statements)

References 123 publications

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“…Recently, graphene like 2D nanostructures such as transition metal dichalcogenides and phosphorene were joined to this group . In addition, the analytical performance of electrochemical detectors coupled to flow systems were dramatically improved due to these nanomaterials . Among the properties of these materials, the high active surface, high conductivity, high passivation resistance, and the electrocatalytic properties should be noted.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical detection based on nanomaterials in CE and microfluidic systems

2018

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Electrochemical detection has a great potential in microfluidic systems due to its easy miniaturization without losing analytical performance. In addition, the use of nanomaterials in electroanalysis improves sensitivity, selectivity, and reproducibility. The topic of this review is the use of nanomaterials (nanoparticles, nanotubes, graphene) in electrochemical detection for capillary electrophoresis and microfluidic systems (microchips and paper based analytical devices). This review covers from 2015 up to now and it is a continuation of our previous review, also published in Electrophoresis journal. The following aspects of the surveyed articles are mainly addressed: type of nanomaterial, protocol of working electrode preparation (composite, drop casting and others), advantages of nanomaterial employment and application field (clinical, food, environmental and home security). The use of nanomaterials is still an interesting approach to improve the analytical performance of electrochemical detection based on microfluidic devices. Along the review, readers will find new protocols for working electrode modification, new carbon nanomaterials and promising applications in the aforementioned fields.

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Section: Introductionmentioning

confidence: 99%

Electrochemical detection based on nanomaterials in CE and microfluidic systems

2018

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“…First, the MWCNTs were treated in HNO 3 (70%, v/v) for 4 h in an oil bar, and the oxidic MWCNTs were obtained. Then the oxidic MWCNTs were further cut into short pipes by a reflux process in H 2 SO 4 and HNO 3 (3:1 v/v, 98% and 70%, respectively) under ultrasonication for 8 h. These treatments generated carboxylic, carbonyl, and hydroxyl groups at the defects on the sidewalls of the MWCNTs, which was essential for further covalent conjugation with amino acid [21]. Finally, the shortened solid MWCNTs were obtained by washed with deionized water repeatedly until the filtrate pH was nearly neutral and dried under infrared lamp.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of chiral separation based on bovine serum albumin–conjugated carbon nanotubes as stationary phase in capillary electrochromatography

et al. 2020

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In this work, we utilized adsorbed BSA and multiwalled carbon nanoparticles (BSA/MWCNTs) as a stationary phase in open tubular (OT) capillary for separation of chiral drugs. (3-Aminopropyl)triethoxysilane was used to assist fabrication of BSA/MWCNTscoated OT column by covalent bonding. Incorporation of MWCNTs nanomaterials into a polymer matrix could increase the phase ratio and take advantage of the easy preparation of an open tubular CEC column. SEM was carried out to characterize the BSA/MWCNTs OT columns. The electrochromatographic performance of the OT columns was evaluated by separation of ketoprofen, ibuprofen, uniconazole, and hesperidin. The effects of MWCNTs concentration, background solution pH and concentration, and applied voltage on separation were investigated. Chiral separations of ketoprofen, ibuprofen, uniconazole, and hesperidin were achieved using the BSA/MWCNTs-coated OT column with resolutions of 24.20, 12.81, 1.50, and 1.85, respectively. Their optimas were found in the 30 mM phosphate buffers at pH 5.0, 6.5, 7.0, and 6.5, respectively. In addition, the columns demonstrated good repeatability and stability with the run-to-run, day-today , and batch-to-batch RSDs of migration times less than 3.5%.

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“…These unique features of this nanomaterial can facilitate the adsorption of analytes in a selective and reproducible manner. Moreover, these properties enable the development of sorbents used for sample preparation and obtaining SP or PSP for analytical separations in different separation techniques including CE . But their poor solubility in water and organic solvents is the main limitation for practical applications due to the lack of functional groups on their surface, which produces a tendency to form agglomerates due to high van der Waals interactions.…”

Section: Carbon‐based Npsmentioning

confidence: 99%

Recent advances in nanomaterial‐based capillary electrophoresis

et al. 2019

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This review gives a summary of applications of different nanomateials, such as gold nanoparticles (AuNPs), carbon‐based nanoparticles, magnetic nanoparticles (MNPs), and nano‐sized metal organic frameworks (MOFs), in electrophoretic separations. This review also emphasizes the recent works in which nanoparticles (NPs) are used as pseudostationary phase (PSP) or immobilized on the capillary surface for enhancement of separation in CE, CEC, and microchips electrophoresis.

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Carbon nanotubes as analytical tools in capillary electromigration methods

Cited by 11 publications

References 123 publications

Electrochemical detection based on nanomaterials in CE and microfluidic systems

Electrochemical detection based on nanomaterials in CE and microfluidic systems

Evaluation of chiral separation based on bovine serum albumin–conjugated carbon nanotubes as stationary phase in capillary electrochromatography

Recent advances in nanomaterial‐based capillary electrophoresis

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