Modified Electrodes for Determining Trace Metal Ions

Chooto, Pipat

doi:10.5772/intechopen.68193

Cited by 8 publications

(7 citation statements)

References 106 publications

(49 reference statements)

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“…230,231 Several reports have described the use of electrochemical sensors for applications in different samples (soil, water, and human fluids) due to their simplicity, selectivity, and possibility to enhance the sensitivity through the incorporation of nanomaterial on the electrode surface. 232 Recently, Alam and collaborators 233 developed a fully integrated electrochemical sensor array (Figure 11B) for monitoring water quality using a wireless connection for data processing. Among the contaminants, the proposed device was able to detect lead by differential pulse anodic stripping voltammetry (DPASV) in lake water, tap water, and pool water.…”

Section: Environmental Applicationsmentioning

confidence: 99%

Wearable and Biodegradable Sensors for Clinical and Environmental Applications

Baldo

Lima

Mendes

et al. 2020

ACS Appl. Electron. Mater.

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This current Review focuses on recent contributions of wearable and biodegradable sensors dedicated to health and environmental applications. Recent examples reported in the literature are presented and critically discussed in order to diagnose diseases and their response to treatment with a focus on cancer and Parkinson’s disease. Advances in devices for body temperature, humidity (skin hydration), human physiological signals, and metal detection in body fluids are demonstrated concerning simple and portable platforms. Studies performed outside the controlled laboratory environment can rapidly help in point-of-care analyses or self-examination by the patients. Environmental approaches are also outlined, aiming at gas detection, metal sensing, and environment humidity, including different substrates showing not only flexible and biodegradable sensors but also wireless detection and data communication. The discussed examples for health and environmental analyses have successfully demonstrated the considerable potential of wearable devices for real-time and on-site applications, highlighting the self-monitoring capacity. Future investigations should consider the device’s operational simplicity with a more straightforward interpretation of results to make them affordable for the market. The huge potential of wearable and biodegradable devices enables them as emerging and powerful platforms for replacing current gold standard methods for rapid health screening and environmental monitoring in the near future. The next trend in the technological field of the development and application of new biodegradable materials to wearable devices should focus on studies involving the stability, toxicity, and biocompatibility of the final devices.

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Section: Environmental Applicationsmentioning

confidence: 99%

Wearable and Biodegradable Sensors for Clinical and Environmental Applications

Baldo

Lima

Mendes

et al. 2020

ACS Appl. Electron. Mater.

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“…Certainly, voltammetry is sensitive to metal ions, but its specificity can be enhanced by electrode modifications and stripping potential. Those who are interested in this area are suggested to get more details elsewhere [59][60][61]. An example of application of cyclic voltammetry to complicated inorganic compounds is the case of nanostructured iron oxides [62].…”

Section: Inorganic Compoundsmentioning

confidence: 99%

Cyclic Voltammetry and Its Applications

Chooto¹

2019

Voltammetry

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Cyclic voltammetry is a versatile method for scientific investigation and innovation due to the fact that most processes involve electron transfer, which makes them be able to be monitored by this technique. Its uses cover characterization, synthesis, mechanisms, and analysis. In all applications, the technique can work well with a large variety of compounds including organic, inorganic, polymer, films, and semiconductors, among others. Furthermore, the method operates satisfactorily whether in a direct or an indirect approach. It can be considered to be an essential part at the very beginning that leads further to the grand project. As an analytical tool, it plays an important role in not only chemistry but also other involving areas. This review sheds the light on the way the technique proves to become one of the important instruments in research, development, and application labs.

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“…Figure 4 shows the current-voltage curves for the electrooxidation of gold deposits from the graphite electrode (GE) surface. The sensitivity of gold determination by the SV method can be significantly increased when modifying the GE surface by organic or inorganic modifiers, such as bismuth(III) [29], tosylate salts of aryldiazonium [30], polyethylene polyimine [31], acrylic polyelectrolyte [32], and ε-Caprolactam [33].…”

Section: Determination Of Gold(iii) Ions By Stripping Voltammetrymentioning

confidence: 99%

Determination of Au(III) and Ag(I) in Carbonaceous Shales and Pyrites by Stripping Voltammetry

Kolpakova

Sabitova

Sachkov³

et al. 2019

Minerals

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Techniques of stripping voltammetry (SV) determination of silver and gold in pyrites and carbonaceous matter are developed. The problem of quantitative transfer of the analytes into the solution is solved. For this purpose, the ore matrix of carbonaceous shales was decomposed by mineral acids in autoclaves at high pressures. The element to be determined from the sample matrix was separated by extraction. Ag(I) ions from the solutions were extracted in the form of a dithizonate complex in CCl4. Au(III) ions were extracted by diethyl ether. The extracts were decomposed thermally. The dry residue was dissolved in the background electrolyte, and the element was determined by the SV method. The graphite electrode (GE) impregnated with polyethylene was used as a working electrode in the SV determination of silver. The SV determination of gold was carried out using a GE modified by bismuth. The limits of detection (LOD) of Ag(I) and Au(III) contents were equal to 0.016 mg L−1 and 0.0086 mg L−1, respectively. The results of SV determination of gold and silver in standard samples, pyrites, and carbonaceous shales were presented. The silver content in the pyrite was 13.6 g t−1, and in carbon shale it was 0.34 g t−1. The concentration of gold in the pyrite of the Kirovsko–Kryklinskaya ore zone was 1.15 g t−1, while in carbonaceous shales it was 2.66 g t−1. The obtained data were consistent with the data of atomic emission spectroscopy (AES) and inductively-coupled plasma mass spectrometry (ICP–MS). The error of determination of elements by stripping voltammetry was calculated as ranging from 10 to 6 g t−1 (less than 12%) in pyrite and carbonaceous material when determining the silver content, and from 1 to 3 g t−1 (less than 22%) when determining the gold content in pyrite and carbonaceous matter.

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Modified Electrodes for Determining Trace Metal Ions

Cited by 8 publications

References 106 publications

Wearable and Biodegradable Sensors for Clinical and Environmental Applications

Wearable and Biodegradable Sensors for Clinical and Environmental Applications

Cyclic Voltammetry and Its Applications

Determination of Au(III) and Ag(I) in Carbonaceous Shales and Pyrites by Stripping Voltammetry

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