Electrochemical sensors for nitrogen species: A review

Ryu, Heejeong; Thompson, Dorian; Huang, Yuankai; Li, Baikun; Lei, Yu

doi:10.1016/j.snr.2020.100022

Cited by 51 publications

(36 citation statements)

References 58 publications

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“…For the electrochemical methods, the suitable modification of the electrode surface can improve the sensor response signals of nitrate and nitrite and extend the dynamic range in analytical determinations. Different materials have been reported to improve the sensor characteristics including carbon nanomaterials such as graphene [ 38 ] and carbon nanotubes [ 39 ], and metallic nanoparticles [ 40 ].…”

Section: Water Contaminantsmentioning

confidence: 99%

A Review of Nanocomposite-Modified Electrochemical Sensors for Water Quality Monitoring

Kanoun

Lazarević‐Pašti

Pašti

et al. 2021

Sensors

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Electrochemical sensors play a significant role in detecting chemical ions, molecules, and pathogens in water and other applications. These sensors are sensitive, portable, fast, inexpensive, and suitable for online and in-situ measurements compared to other methods. They can provide the detection for any compound that can undergo certain transformations within a potential window. It enables applications in multiple ion detection, mainly since these sensors are primarily non-specific. In this paper, we provide a survey of electrochemical sensors for the detection of water contaminants, i.e., pesticides, nitrate, nitrite, phosphorus, water hardeners, disinfectant, and other emergent contaminants (phenol, estrogen, gallic acid etc.). We focus on the influence of surface modification of the working electrodes by carbon nanomaterials, metallic nanostructures, imprinted polymers and evaluate the corresponding sensing performance. Especially for pesticides, which are challenging and need special care, we highlight biosensors, such as enzymatic sensors, immunobiosensor, aptasensors, and biomimetic sensors. We discuss the sensors’ overall performance, especially concerning real-sample performance and the capability for actual field application.

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Section: Water Contaminantsmentioning

confidence: 99%

A Review of Nanocomposite-Modified Electrochemical Sensors for Water Quality Monitoring

Kanoun

Lazarević‐Pašti

Pašti

et al. 2021

Sensors

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“…An interesting organic material studied for biosensors is chitosan, which is generally combined with metal-oxide nanoparticles or carbon nanotubes to increase its electrical properties for sensing applications [ 12 , 13 ]. Bibi et al [ 14 ] presented an MWCNT paste electrode modified with chitosan functionalized Ag-NPs while Li et al [ 15 ] reported a sensor based on chitosan, MWCNTs, and carbon nanoparticles (CNs), and Bai et al presented a multilayer film sensor based on H 7 P 2 Mo 17 V 1 O 62 (P 2 Mo 17 V)-carbon nanotubes and Pt-chitosan [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Nitrites Detection with Sensors Processed via Matrix-Assisted Pulsed Laser Evaporation

et al. 2022

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This work is focused on the application of a laser-based technique, i.e., matrix-assisted pulsed laser evaporation (MAPLE) for the development of electrochemical sensors aimed at the detection of nitrites in water. Commercial carbon-based screen-printed electrodes were modified by MAPLE via the application of a newly developed composite coating with different concentrations of carbon nanotubes (CNTs), chitosan, and iron (II) phthalocyanine (C32H16FeN8). The performance of the newly fabricated composite coatings was evaluated both by investigating the morphology and surface chemistry of the coating, and by determining the electro-catalytic oxidation properties of nitrite with bare and modified commercial carbon-based screen-printed electrode. It was found that the combined effect of CNTs with chitosan and C32H16FeN8 significantly improves the electrochemical response towards the oxidation of nitrite. In addition, the MAPLE modified screen-printed electrodes have a limit of detection of 0.12 µM, which make them extremely useful for the detection of nitrite traces.

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“…Another application, though one that is not yet fully explored, is the use of impedance spectroscopy for the detection of nitrogen species in water. A recent review [ 10 ] discusses various electrochemical sensors for this purpose, but only a single impedance spectroscopy system is listed and it is for the detection of nitrites [ 11 ]. This impedance spectroscopy sensor could detect a wide concentration of nitrite with high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Validation of Low-Cost Impedance Analyzer via Nitrate Detection

Beer

Joubert

2021

Sensors

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Impedance spectroscopy is a widely used electrochemical technique with a wide variety of applications. Many of these applications benefit from the additional accessibility provided by low-cost impedance devices. With this in mind, a low-cost impedance device was designed for a high performance-to-cost ratio. The performance of this analyzer was validated against a high-performance DropSens µStat-i 400s potentiostat by performing an application-based experiment. Nitrate detection provides a relevant experiment because of the importance of maintaining precise nitrate concentrations to mitigate the impact of nitrate fluctuations on the environment. Dissolved nitrate samples of different concentrations, in the range 3–1000 mg/L, were confirmed colorimetrically and measured with both instruments. A calibration curve of the real impedance matched a sigmoidal transfer, with a linear region for concentrations below 10 mg/L. The device under investigation exhibited an average magnitude error of 1.28% and an average phase error of 0.96∘ relative to the high-performance standard, which validates the performance of the low-cost device. A cost analysis is presented that highlights some of the complexities of cost comparisons.

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Electrochemical sensors for nitrogen species: A review

Cited by 51 publications

References 58 publications

A Review of Nanocomposite-Modified Electrochemical Sensors for Water Quality Monitoring

A Review of Nanocomposite-Modified Electrochemical Sensors for Water Quality Monitoring

Nitrites Detection with Sensors Processed via Matrix-Assisted Pulsed Laser Evaporation

Validation of Low-Cost Impedance Analyzer via Nitrate Detection

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