Ten years of axial capacitively coupled contactless conductivity detection for CZE – a review

Kubáň, Pavel; Hauser, Peter C.

doi:10.1002/elps.200800478

Cited by 204 publications

(105 citation statements)

References 113 publications

(151 reference statements)

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“…These include the peaks corresponding to the analytes, system peaks and noise components. Mathematically, the model for an unfiltered/raw electropherogram signal can be expressed, e.g., in the form of voltage v(t) (Kubáň and Hauser 2009) …”

Section: Modelling An Electropherogram Signalmentioning

confidence: 99%

Signal Processing Methods for Capillary Electrophoresis

Stewart¹,

Gideoni²,

Zhu³

2011

Systems and Computational Biology - Bioinformatics and Computational Modeling

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Section: Modelling An Electropherogram Signalmentioning

confidence: 99%

Signal Processing Methods for Capillary Electrophoresis

Stewart¹,

Gideoni²,

Zhu³

2011

Systems and Computational Biology - Bioinformatics and Computational Modeling

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“…Capacitively coupled contactless conductivity detection (C 4 D) has been used extensively as a detector in separation science. 24,25 In addition, the C 4 D cell has found alternate use as a characterisation tool of stationary phases for capillary columns, 26 separation channels in microfluidic devices, 27 flow measurements, 28 and a recent electrical sensor for the simultaneous amplification and detection of specific sequence DNA. 29 The true benefit of this form of detection is related to its non-destructive character, providing characteristic information regarding the cell contents without disturbing the system under observation.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of graphene fibres and graphene coated fibres using capacitively coupled contactless conductivity detector

Cabot

Duffy

Currivan

et al. 2016

Analyst

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The use of capacitively coupled contactless conductivity detection (C 4 D) for the characterisation of thin conductive graphene fi bres, graphene composite fi bres, and graphene coated fi brous materials is demonstrated for the fi rst time. Within a few seconds, the non-destructive C 4 D detector provides a pro fi le of the longetudinal physical homogeneity of the fi bre, as well as extra information regarding fi bre mophology and composition. In addition to the theoretical considerations related to the factors a ff ect the output signal, this work evaluates the properties of graphene fi bres using scanning C 4 D following the manufac-turing process of wet-spinning. Furthermore, conductive graphene-coated fi brous materials and the e ff ectiveness of the coating and reduction procedures applied could be investigated. Apart from the application of C 4 D in the monitoring of such processes, the feasibility of this small, highly sensitive and rapidly-responsive detector to monitor strain and elasticity responses of conductive and elastomeric composite fi bres for applications in motion sensing, biomedical monitoring, and stretchable electronics was also demonstrated.Keywords graphene, fibres, coated, capacitively, coupled, contactless, conductivity, detector, characterisation Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsCabot, J. M., Duffy, E., Currivan, S., Ruland, A., Jalili, R., Mozer, A. J., Innis, P. C., Wallace, G. G., Breadmore, M. & Paull, B. (2016). Characterisation of graphene fibres and graphene coated fibres using capacitively coupled contactless conductivity detector. The Analyst, 141 (9), 2774-2782. AuthorsJoan M. Cabot, Emer Duffy, Sinead Currivan, Andres Ruland Palaia, Rouhollah Jalili, Attila J. Mozer, Peter C. Innis, Gordon G. Wallace, Michael C. Breadmore, and Brett Paull The use of capacitively coupled contactless conductivity detection (C 4 D) for the characterisation of thin conductive graphene fibres, graphene composite fibres, and graphene coated fibrous materials is demonstrated for the first time. Within a few seconds, the non-destructive C 4 D detector provides a profile of the longetudinal physical homogeneity of the fibre, as well as extra information regarding fibre mophology and composition. In addition to the theoretical considerations related to the factors affect the output signal, this work evaluates the properties of graphene fibres using scanning C 4 D following the manufacturing process of wet-spinning. Furthermore, conductive graphene-coated fibrous materials and the effectiveness of the coating and reduction procedures applied could be investigated. Apart from the application of C 4 D in the monitoring of such processes, the feasibility of this small, highly sensitive and rapidly-responsive detector to monitor strain and elasticity responses of conductive and elastomeric composite fibres for applications in motion sensing, biomedical monitoring, and stretchable electronics was also demonstrated.

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“…A poly(methylmethacrylate) (PMMA) microchip platform with integrated capacitively coupled contactless conductivity detection (C 4 D) [15,16] forms the basis for efficient and sensitive determinations of hy. In addition, the serious problem of matrix interferences is addressed, and a compatible sample pretreatment protocol based on headspace single-drop microextraction (HS-SDME) [17,18] is applied to face these challenges.…”

Section: Introductionmentioning

confidence: 99%

Determination of hydrazines by chip electrophoresis with contactless conductivity detection

et al. 2011

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In this report, a new approach for the fast determination of hydrazine compounds (hy) in complex matrices is presented. The experimental protocol is based on poly(methylmethacrylate) (PMMA) microchip separations with contactless conductivity detection using a compact portable device, which integrates all separation and detection components. Three hy (hydrozine (Hy), methylhydrazine (MH), and 1,1-dimethylhydrazine (UDMH)) were separated within < 30 s at a separation voltage of 3.8 kV using a L(-)-histidine/2-(N-morpholinoethanesulfonic acid) (His/MES) buffer (25:50 mM, pH 5.87). The contactless conductivity detection enables detection limits for Hy, MH, and UDMH of 11.9, 35.5, and 337.8 ng/mL, respectively, with linear concentration dependence up to 10 μg/mL. In complex matrices such as soil samples or river water, interferences were eliminated by implementing ultrasound-assisted headspace single-drop microextraction of hy under strongly alkaline conditions, using an aqueous drop of His/MES buffer as the extractant phase. The incorporation of this miniaturized sample preparation step led to improved limits of detection for Hy, MH, and UDMH of 6.5, 15.3, and 11.4 ng/mL, respectively. The overall protocol demonstrates a promising approach for interfacing chip electrophoresis with real-world applications.

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Ten years of axial capacitively coupled contactless conductivity detection for CZE – a review

Cited by 204 publications

References 113 publications

Signal Processing Methods for Capillary Electrophoresis

Signal Processing Methods for Capillary Electrophoresis

Characterisation of graphene fibres and graphene coated fibres using capacitively coupled contactless conductivity detector

Determination of hydrazines by chip electrophoresis with contactless conductivity detection

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