Square Wave Voltammetric Determination of Nitrate at a Freshly Copper Plated Glassy Carbon Electrode

Solak, Alı Osman; Çekirdek, Pınar

doi:10.1081/al-200045149

Cited by 14 publications

(2 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, it is important that the levels of such toxins in water be monitored. There are multiple methods used to detect the many dangerous particulates in water, such as Potentiometric [9], Amperometric [10], Voltammetric [11], Planar Electromagnetic [12], Fiber Optic [13], and Metasurface [4,6,7] sensing techniques. However, current metasurface sensing techniques designed to detect dangerous charged particles in solution may not be living up to their full potential.…”

Section: Introductionmentioning

confidence: 99%

A Novel Electrophoretic Technique to Improve Metasurface Sensing of Low Concentration Particles in Solution

Kurland,

Goyette

2023

Sensors

View full text Add to dashboard Cite

A novel electrophoretic technique to improve metasurface sensing capabilities of charged particles in solution is presented. The proposed technique may improve the ability of metasurfaces to sense charged particles in solution in a manner not possible using the current standard of particle deposition (which allows particles to sediment randomly on a metasurface under evaporation) by inducing an external, nonuniform electric field through the metasurface apertures. Such a technique may be useful in various sensing applications, such as in biological, polymer, or environmental sciences, where low concentration particles in solution are of interest. The electrophoretic technique was simulated and experimentally tested using latex nanoparticles in solution. The results suggest that, using this technique, one may theoretically increase the particle density within the metasurface regions of greatest sensitivity by nearly 1900% in comparison to random sedimentation due to evaporation. Such an increase in particle density within the regions of greatest sensitivity may facilitate more precise material property measurements and enhance identification and detection capabilities of metasurfaces to particles in solution which constitute only a few hundred parts per million by mass. It was experimentally determined that the electrophoretic technique enhanced metasurface sensing capabilities of 333 parts per million by mass latex nanoparticle solutions by nearly 1700%.

show abstract

Section: Introductionmentioning

confidence: 99%

A Novel Electrophoretic Technique to Improve Metasurface Sensing of Low Concentration Particles in Solution

Kurland,

Goyette

2023

Sensors

View full text Add to dashboard Cite

show abstract

“…However, often these methods involve high costs, low suitability for certain applications and technical limitations. Currently, electrochemical detection using different electrodes materials (14)(15)(16)(17)(18)(19) have been widely used with the same purpose, once it has presented high sensitivity, selectivity and versatility associated to their fast response of analysis and low cost.…”

Section: Introductionmentioning

confidence: 99%

The Grain Size Influence on Boron Doped Diamond Sensitivity for Nitrate Electrochemical Reduction

et al. 2010

View full text Add to dashboard Cite

The excessive presence of nitrate ions (NO 3 -) in water mainly caused by the fertilizing in agriculture process may promote dangerous ecological complications [1]. Considering different methodologies to detect and to destruct nitrate ions, the electrochemical process appears as a promising and cheaper technique [2]. Due to its singular electrochemical properties, boron doped diamond electrodes have shown good efficiency for eletrolyses and nitrate reduction [3]. None the less, the diamond properties may depend on the different experimental conditions such as doping level and sp 2 /sp 3 ratio that influence the film grain size and also its crystallographic orientation. This work presents the electrochemical behavior for nitrate reduction using heavily doped diamond electrodes produced at different growth times that represents an evolution in the film grain size. These different morphologies may determine the better physical-chemical characteristic for electroanalytical applications.The films were prepared by hot filament CVD technique using the standard mixture of H 2 /CH 4 with an additional H 2 flux passing through a bubbler containing a suitable concentration of B 2 O 3 dissolved in methanol to assure films with acceptor concentration around 10 21 cm -3 . The growth times were 5, 7 and 10 h corresponding to samples A,B and C, respectively. Diamond quality, morphology and crystallinity were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), Raman spectroscopy and x-ray diffraction techniques. Electrochemical measurements were carried out from a Potentiostat Autolab PGSTAT 32 using solutions of 0,1 mol/L de Na 2 SO 4 , 0,1 mol/L KNO 3 e 0,1 mol/L Na 2 SO 4 + 0,1 mol/L KNO 3 .The SEM and AFM analyses of diamond films showed the grain size increase as a function of the growth time, which are present in Fig. 1 for samples A and C. The films A and C showed heterogeneity due to the competition among their crystallographic planes. The electrochemical response for nitrate reduction was obtained from cyclic voltammetry comparing the results for the three samples without and with nitrate addition.The influence of the electrolyte composition may be observed in Fig.2. The hydrogen evolution is kept at the same potential region for the three electrodes without nitrate addition. Otherwise, in Fig 2b with the nitrate presence, a negative shift in the potential region is observed mainly for electrode grown during 5 h. This behavior is attributed to the morphologic difference among such samples. As the grain size decreases the sp 2 content at the grain boundary increases promoting an easier diamond oxidation leading to an electrode surface that blocks the active surface sites.

show abstract

Green Approaches to Field Nitrate Analysis: An Electroanalytical Perspective

et al. 2009

View full text Add to dashboard Cite

The different approaches that have been taken in the development of analytical methods for the determination of nitrate within the field are reviewed. The emphasis has been placed on providing a critical appraisal of the chemistry that underpins current commercial systems and the need to remove the dependence on heavy metal and concentrated acid components. The search for more environmentally acceptable and user friendly systems has long been pursued and the present communication seeks to explore the recent development in portable testing technologies and how they might evolve in the future. In particular, the role of electrochemical techniques in the latter are investigated and their potential application compared and contrasted with the more traditional wet chemical detection strategies.

show abstract

Square Wave Voltammetric Determination of Nitrate at a Freshly Copper Plated Glassy Carbon Electrode

Cited by 14 publications

References 24 publications

A Novel Electrophoretic Technique to Improve Metasurface Sensing of Low Concentration Particles in Solution

A Novel Electrophoretic Technique to Improve Metasurface Sensing of Low Concentration Particles in Solution

The Grain Size Influence on Boron Doped Diamond Sensitivity for Nitrate Electrochemical Reduction

Green Approaches to Field Nitrate Analysis: An Electroanalytical Perspective

Contact Info

Product

Resources

About