Contactless sensing of the conductivity of aqueous droplets in segmented flow

Cahill, Brian; Land, Raul; Nacke, Thomas; Min, Mart; Beckmann, D.

doi:10.1016/j.snb.2011.07.006

Cited by 46 publications

(40 citation statements)

References 49 publications

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“…Applications of C 4 D without electrophoretic or chromatographic separation include flow injection analysis (FIA) , SI analysis , and other methods operating with liquid or even gaseous flows. FIA was also used in the testing of C 4 D on a microfluidic device using simple salt solutions at different concentrations .…”

Section: C4d In Other Flow‐through Methodsmentioning

confidence: 99%

“…A reagent‐free SI analysis method for CO 2 determination in soft drinks was described by Teerasong et al . Aqueous droplets of a saline solution were detected based on their higher conductivity in a segmented flow of an organic solvent . Another example of determination of aqueous solutions in organic liquids using contactless impedimetric detection was demonstrated by Opekar et al .…”

Section: C4d In Other Flow‐through Methodsmentioning

confidence: 99%

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Contactless conductivity detection for analytical techniques: Developments from 2010 to 2012

Kubáň

Hauser

2012

Electrophoresis

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The developments in the field of capacitively coupled contactless conductivity detection in the approximate period from July 2010 to June 2012 are traced. Few reports concerning fundamental studies or new detector designs have appeared. On the other hand, applications in standard CZE are flourishing and contactless conductivity measurements are increasingly being employed as part of novel or more sophisticated experimental systems. Work on the lab-on-chip devices integrating contactless conductivity detection is continuing. A range of reports on the use of the simple yet powerful detection technique of contactless conductivity measurements in chromatographic separation as well as for analytical methods not including a separation step have also appeared.

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Section: C4d In Other Flow‐through Methodsmentioning

confidence: 99%

Section: C4d In Other Flow‐through Methodsmentioning

confidence: 99%

Contactless conductivity detection for analytical techniques: Developments from 2010 to 2012

Kubáň

Hauser

2012

Electrophoresis

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“…The literature records an amplitude range from 0.5 V [19] to 450 V [31], but the most common values are 10 to 20 V, provided by standard AC signal generators. The amplitudes of the input alternating voltage can be an order of magnitude lower if a commercial instrument is used for impedance spectrometry, see references [32,33]. …”

Section: Operational Parameters Of Impedance Cellsmentioning

confidence: 99%

Contactless Impedance Sensors and Their Application to Flow Measurements

Opekar

Tůma

Štulı́k

2013

Sensors

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The paper provides a critical discussion of the present state of the theory of high-frequency impedance sensors (now mostly called contactless impedance or conductivity sensors), the principal approaches employed in designing impedance flow-through cells and their operational parameters. In addition to characterization of traditional types of impedance sensors, the article is concerned with the use of less common sensors, such as cells with wire electrodes or planar cells. There is a detailed discussion of the effect of the individual operational parameters (width and shape of the electrodes, detection gap, frequency and amplitude of the input signal) on the response of the detector. The most important problems to be resolved in coupling these devices with flow-through measurements in the liquid phase are also discussed. Examples are given of cell designs for continuous flow and flow-injection analyses and of detection systems for miniaturized liquid chromatography and capillary electrophoresis. New directions for the use of these sensors in molecular biology and chemical reactors and some directions for future development are outlined.

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“…The emergence of contactless conductivity detection (CCD, also known as capacitively coupled contactless conductivity detection, C 4 D) technique may provide an effective solution . With CCD technique, it is possible to develop a contactless sensor which is suitable for the online monitoring of boiling process in mini‐channels.…”

Section: Introductionmentioning

confidence: 99%

A new method for online monitoring of boiling process in mini‐channels

et al. 2019

AIChE Journal

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A new method for online monitoring of boiling process, which is suitable for conductive fluids in mini‐channels, is proposed with the introduction of contactless conductivity detection (CCD) technique and perceptron algorithm (PA) technique. Series resonance principle and simulated inductor technique were adopted to develop a new CCD sensor. PA was used to implement the boiling stage identification, i.e., to identify the current stage was which stage of the boiling process. Three prototypes of the CCD sensors with inner diameters of 1.6, 2.0, and 2.5 mm were developed. With three kinds of conductive fluids (tap water, ethanol–tap water mixture, and KCl solution), boiling experiments were carried out. The experimental results show that the CCD sensor can effectively track the bubble growth of boiling process. The research results also indicate that the proposed method is effective and the identification accuracies are greater than 90.0%. © 2019 American Institute of Chemical Engineers AIChE J, 65: 1365–1375, 2019

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Contactless sensing of the conductivity of aqueous droplets in segmented flow

Cited by 46 publications

References 49 publications

Contactless conductivity detection for analytical techniques: Developments from 2010 to 2012

Contactless conductivity detection for analytical techniques: Developments from 2010 to 2012

Contactless Impedance Sensors and Their Application to Flow Measurements

A new method for online monitoring of boiling process in mini‐channels

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