scholarly journals Recent developments in electrochemistry at the interface between two immiscible electrolyte solutions for ion sensing

The Analyst ◽  
2015 ◽  
Vol 140 (12) ◽  
pp. 3888-3896 ◽  
Author(s):  
Grégoire Herzog
Keyword(s):  
Electrolyte Solutions ◽  
Liquid Interface ◽  
Electrochemical Sensing ◽  
Ion Sensing ◽  
Recent Developments

The most recent developments on electrochemical sensing of ions at the liquid–liquid interface are reviewed here.

scholarly journals Recent Advances in the Detection of Neurotransmitters

Chemosensors ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 1 ◽  
Author(s):  
Bo Si ◽  
Edward Song
Keyword(s):  
Ex Vivo ◽  
Simultaneous Detection ◽  
High Sensitivity ◽  
Mental Illnesses ◽  
Electrochemical Sensing ◽  
Fast Scan Cyclic Voltammetry ◽  
In Vivo Detection ◽  
Recent Developments ◽  
Materials Used

Neurotransmitters are chemicals that act as messengers in the synaptic transmission process. They are essential for human health and any imbalance in their activities can cause serious mental disorders such as Parkinson’s disease, schizophrenia, and Alzheimer’s disease. Hence, monitoring the concentrations of various neurotransmitters is of great importance in studying and diagnosing such mental illnesses. Recently, many researchers have explored the use of unique materials for developing biosensors for both in vivo and ex vivo neurotransmitter detection. A combination of nanomaterials, polymers, and biomolecules were incorporated to implement such sensor devices. For in vivo detection, electrochemical sensing has been commonly applied, with fast-scan cyclic voltammetry being the most promising technique to date, due to the advantages such as easy miniaturization, simple device architecture, and high sensitivity. However, the main challenges for in vivo electrochemical neurotransmitter sensors are limited target selectivity, large background signal and noise, and device fouling and degradation over time. Therefore, achieving simultaneous detection of multiple neurotransmitters in real time with long-term stability remains the focus of research. The purpose of this review paper is to summarize the recently developed sensing techniques with the focus on neurotransmitters as the target analyte, and to discuss the outlook of simultaneous detection of multiple neurotransmitter species. This paper is organized as follows: firstly, the common materials used for developing neurotransmitter sensors are discussed. Secondly, several sensor surface modification approaches to enhance sensing performance are reviewed. Finally, we discuss recent developments in the simultaneous detection capability of multiple neurotransmitters.

scholarly journals Screen-printed back-to-back electroanalytical sensors: heavy metal ion sensing

The Analyst ◽  
2015 ◽  
Vol 140 (12) ◽  
pp. 4130-4136 ◽  
Author(s):  
Ana P. Ruas de Souza ◽  
Christopher W. Foster ◽  
Athanasios V. Kolliopoulos ◽  
Mauro Bertotti ◽  
Craig E. Banks
Keyword(s):  
Heavy Metal ◽  
Drinking Water ◽  
Metal Ion ◽  
Electrochemical Sensing ◽  
Heavy Metal Ion ◽  
Icp Oes ◽  
Ion Sensing ◽  
Metal Ion Sensing ◽  
Heavy Metal Ion Sensing ◽  
Screen Printed

The back-to-back screen-printed electrochemical sensing approach is applied to the quantification of lead(ii) in drinking water which is independently verified with ICP-OES.

scholarly journals Glass-like carbon, pyrolytic graphite or nanostructured carbon for electrochemical sensing of bismuth ion?

2016 ◽  
Vol 10 (2) ◽  
pp. 87-95 ◽  
Author(s):  
Jadranka Milikic ◽  
Nevena Markicevic ◽  
Aleksandar Jovic ◽  
Radmila Hercigonja ◽  
Biljana Sljukic
Keyword(s):  
Deposition Time ◽  
Limit Of Detection ◽  
Anodic Stripping Voltammetry ◽  
Pyrolytic Graphite ◽  
Stripping Voltammetry ◽  
Electrochemical Sensing ◽  
Nanostructured Carbon ◽  
Ion Sensing ◽  
Current Densities ◽  
Pyrolytic Graphite Electrode

Different carbon electrodes were explored for application in electroanalysis, namely for sensing of bismuth ion as model analyte. Carbon materials tested included glassy carbon, basal and edge plane pyrolytic graphite, as well as nanostructured carbonized polyaniline prepared in the presence of 3,5-dinitrosalicylic acid. Bismuth ion was chosen as model analyte as protocol for its detection and quantifications is still to be determined. Herein, anodic stripping voltammetry was used with study of effect of several parameters such as scan rate and deposition time. Electrode based on carbonized polyaniline showed the highest activity for bismuth ion sensing in terms of the highest current densities recorded both in a laboratory and in real sample, while basal plane pyrolytic graphite electrode gave the lowest limit of detection.

scholarly journals Light Scattering by Pure Water and Seawater: Recent Development

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Xiaodong Zhang ◽  
Lianbo Hu
Keyword(s):  
Light Scattering ◽  
Pure Water ◽  
Critical Role ◽  
Extreme Environments ◽  
Electrolyte Solutions ◽  
Ocean Optics ◽  
Depolarization Ratio ◽  
Spectral Absorption ◽  
Molecular Scattering ◽  
Recent Developments

Light scattering by pure water and seawater is a fundamental optical property that plays a critical role in ocean optics and ocean color studies. We briefly review the theory of molecular scattering in liquid and electrolyte solutions and focus on the recent developments in modeling the effect of pressure, extending to extreme environments, and evaluating the effect of salinity on the depolarization ratio. We demonstrate how the modeling of seawater scattering can be applied to better understand spectral absorption and attenuation of pure water and seawater. We recommend future efforts should be directed at measuring the polarized components of scattering by pure water over a greater range of wavelengths, temperature, salinity, and pressure to constrain and validate the model and to improve our knowledge of the water’s depolarization ratio.

Recent developments on optical and electrochemical sensing of copper(II) ion based on transition metal complexes

2017 ◽  
Vol 343 ◽  
pp. 278-307 ◽  
Author(s):  
Arumugam Ramdass ◽  
Veerasamy Sathish ◽  
Eththilu Babu ◽  
Murugesan Velayudham ◽  
Pounraj Thanasekaran ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Electrochemical Sensing ◽  
Recent Developments

scholarly journals Direct assessment of solid–liquid interface noise in ion sensing using a differential method

2016 ◽  
Vol 108 (15) ◽  
pp. 151603 ◽  
Author(s):  
Da Zhang ◽  
Indrek Must ◽  
Nathan L. Netzer ◽  
Xingxing Xu ◽  
Paul Solomon ◽  
...  
Keyword(s):  
Differential Method ◽  
Liquid Interface ◽  
Direct Assessment ◽  
Ion Sensing ◽  
Solid Liquid Interface ◽  
Solid Liquid

scholarly journals Solubility and related properties in hydrometallurgy

2009 ◽  
Vol 81 (9) ◽  
pp. 1537-1545 ◽  
Author(s):  
Erich Königsberger ◽  
Glenn Hefter ◽  
Peter M. May
Keyword(s):  
Environmental Sustainability ◽  
Product Yield ◽  
Electrolyte Solutions ◽  
Measured Data ◽  
Critical Importance ◽  
Thermodynamic Process ◽  
Multiphase Systems ◽  
Process Simulations ◽  
Recent Developments ◽  
Yield And Purity

Thermodynamically consistent models based on accurately measured data are required for reliable predictions of equilibria and thermodynamic properties for a wide variety of multicomponent, multiphase systems and reactions relevant to hydrometallurgy. Recent developments in our laboratory concerning the measurement and modeling of physicochemical properties of electrolyte solutions over wide ranges of conditions are reviewed. Particular emphasis is on applications to the refining of alumina via the Bayer process, in which various solubility phenomena involving solid, aqueous, and gaseous phases are of critical importance to product yield and purity as well as to economical and environmental sustainability. Appropriately designed models and software allow these aspects to be tackled by thermodynamic process simulations of alumina refinery circuits.

Sign in / Sign up

Export Citation Format

Share Document