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51 Newest Publications about the topic coulometry

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Indirect determination of zinc by thiol complexation and iodine coulometric titration with photocell detection

05-Jun-2017 | Author(s): Jeralyne B. Padilla Mercado, Dominik Konkolewicz, Stacey Lowery Bretz, Neil D. Danielson, Microchemical Journal, 2017

Publication date: September 2017 Source:Microchemical Journal, Volume 134 Author(s): Jeralyne B. Padilla Mercado, Dominik Konkolewicz, Stacey Lowery Bretz, Neil D. Danielson We have extended the capabilities of iodine coulometry for the determination of ionic zinc through its ...

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Exploring nanoparticle porosity using nano-impacts: platinum nanoparticle aggregates

20-Dec-2016 | Xue Jiao; Stanislav V. Sokolov; Eden E. L. Tanner; Neil P. Young; Richard G. Compton, Physical Chemistry Chemical Physics, 2016

The porosity of platinum nanoparticles (PtNPs) is explored for the first time using tag-redox coulometry (TRC). This is achieved by monitoring the reduction of the 4-nitrobenzenethiol (NTP)-tagged PtNPs on carbon electrodes via both immobilisation and nanoimpacts. The average charge per impact is ...

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Exploring Nanoparticle Porosity Using Nano-Impacts: Platinum Nanoparticle Aggregates

13-Dec-2016 | Xue Jiao; Stanislav V. Sokolov; Eden Elizabeth Louise Tanner; Neil P Young; Richard G Compton, Physical Chemistry Chemical Physics, 2016

The porosity of platinum nanoparticles (PtNPs) is explored for the first time using tag-redox coulometry (TRC). This is achieved by monitoring the reduction of the 4-Nitrobenzenethiol(NTP)-tagged PtNPs on carbon electrodes via both immobilisation and nanoimpacts. The average charge per impact is ...

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Microfluidic Separation of Redox Reactions for Coulometry Based on Metallization at the Mixed Potential

15-Sep-2016 | Kazuhiro Ikemoto; Takafumi Seki; Shohei Kimura; Yui Nakaoka; Shinnosuke Tsuchiya; Fumihiro Sassa; Masatoshi Yokokawa ..., Analytical Chemistry, 2016

Coulometric detection of an analyte in a solution at nanoliter scale was conducted by having redox reactions proceed simultaneously on a platinum electrode. The analyte was oxidized on a part of the electrode in one flow channel and silver was deposited on an array of circular microelectrodes ...

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Direct Measurement of Electron Transfer in Nanoscale Host–Guest Systems: Metallocenes in Carbon Nanotubes

28-Jul-2016 | Robert L. McSweeney, Thomas W. Chamberlain, Matteo Baldoni, Maria A. Lebedeva, E. Stephen Davies, Elena Besley, Andr ..., Chemistry - A European Journal, 2016

Abstract Electron‐transfer processes play a significant role in host–guest interactions and determine physicochemical phenomena emerging at the nanoscale that can be harnessed in electronic or optical devices, as well as biochemical and catalytic systems. A novel method for qualifying and ...

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Millisecond Coulometry via Zeptoliter Droplet Collisions on an Ultramicroelectrode

16-Jun-2016 | Jeffrey E. Dick, Estelle Lebègue, Lauren M. Strawsine, Allen J. Bard, Electroanalysis, 2016

Abstract We show that discrete collisions of zeptoliter emulsion droplets on an ultramicroelectrode (UME) can be used as individual controlled potential coulometry experiments, lasting between 100 and 500 milliseconds. By loading a highly hydrophobic toluene droplet with a hydrophobic analyte ...

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Simultaneous determination of five common additives in insulating mineral oils by high‐performance liquid chromatography with ultraviolet and coulometric detection

09-Jun-2016 | Maria Concetta Bruzzoniti, Corrado Sarzanini, Luca Rivoira, Vander Tumiatti, Riccardo Maina, Journal of Separation Science, 2016

Dielectric mineral oils are used to impregnate power transformers and large electrical apparatus, acting as both liquid insulation and heat dissipation media. Antioxidants and passivators are frequently added to mineral oils to enhance oxidation stability and reduce the electrostatic charging ...

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Electrodic Reduction of Core-Shell Ferrite Magnetic Nanoparticles

24-May-2016 | Cleber Lopes Filomeno; Epitácio Pinto Marinho; Renata Aquino; Franciscarlos Gomes da Silva; Emmanuelle Dubois; Jérôm ..., New Journal of Chemistry, 2016

We present Square-Wave Voltammetry (SWV) and Controlled Potential Coulometry (bulk electrolysis) experiments performed on maghemite and ferrite nanoparticles of core-shell type MFe2O4@γ-Fe2O3 (where M = Mn2+, Co2+, Cu2+ or Zn2+), dispersed in aqueous media. The potential position of iron (III) ...

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New Signal Readout Principle for Solid-Contact Ion-Selective Electrodes

07-Apr-2016 | Ulriika Vanamo; Elisa Hupa; Ville Yrjänä; Johan Bobacka, Analytical Chemistry, 2016

A novel approach to signal transduction concerning solid-contact ion-selective electrodes (SC-ISE) with a conducting polymer (CP) as the solid contact is investigated. The method presented here is based on constant potential coulometry, where the potential of the SC-ISE vs the reference electrode ...

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Impact electrochemistry: colloidal metal sulfide detection by cathodic particle coulometry

16-Oct-2015 | Chee Shan Lim; Martin Pumera, Physical Chemistry Chemical Physics, 2015

The determination of the size and concentration of colloidal nano and microparticles is of paramount importance to modern nanoscience. Application of the particle collision technique on metal and metal oxide nanoparticles has been intensively explored over the past decade owing to its ability to ...

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