Differential pulse voltammetric determination of 4-nitroaniline using a glassy carbon electrode: comparative study between cathodic and anodic quantification

Pfeifer, Rene; Tamiasso-Martinhon, Priscila; Silva, Célia Regina Sousa da; Moreira, Josino Costa; Nascimento, Marco Antônio Chaer; Barek, Jiřı́

doi:10.1007/s00706-015-1596-3

Cited by 18 publications

(5 citation statements)

References 19 publications

(27 reference statements)

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“…The obtained results do not reach the LoD achieved by some more sensitive detection systems for 4‐NP , but prove vAuE‐AgAPs’ applicability in organic electroanalysis of nitro compounds with LoDs down to micromolar concentrations and confirmed satisfactory repeated AgAP deposition reproducibility.…”

Section: Resultsmentioning

confidence: 99%

Electrodeposition of Silver Amalgam on Thin Gold Film Electrodes for Voltammetric Detection of 4‐Nitrophenol and DNA Labeled with Osmium Tetroxide‐Bipyridine Complex

2019

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Alternative electrode materials suitable to prepare novel working electrode applicable in detecting biopolymers such as nucleic acids, proteins or glycoproteins, represent a significant contribution to bio‐electroanalysis. Herein, electrodes made of vapor‐deposited thin gold films (vAuE) were used as an alternative substrate for the electrodeposition of silver amalgam particles (AgAPs), next to indium tin oxide and pyrolytic graphite, which are already used. The conditions and parameters of double pulse chronoamperometry were optimized for the most‐sensitive voltammetric detection of 4‐nitrophenol (4‐NP). The resulting electrodes were characterized by scanning electron microscope with energy dispersive X‐ray spectroscopy. While 4‐NP could not be detected by bare nonactivated vAuEs at all, their electrochemical activation offered a limit of detection (LoD) of 25 and 5 μmol.l−1 by means of CV and DPV, respectively. AgAP electrodeposited on vAuE, offered 2.5‐times lower LoDs 10 μmol.l−1 by CV and comparable LoD 5 μmol.l−1 by DPV. Advantageously, AgAPs could be repeatedly deposited on and anodically dissolved from the vAuE with a relative standard deviation 13 % of the ten‐times repeated DPV signal of 4‐NP (100 μmol.l−1). In comparison to vAuE, the vAuE‐AgAP offered about 400 mV broader potential window, which allowed detection of single strand DNA fragment labeled by osmium tetroxide−bipyridine complex down to 2 ng.μl−1 by means of DPV.

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Section: Resultsmentioning

confidence: 99%

Electrodeposition of Silver Amalgam on Thin Gold Film Electrodes for Voltammetric Detection of 4‐Nitrophenol and DNA Labeled with Osmium Tetroxide‐Bipyridine Complex

2019

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“…Figure 6b shows that the linear range for the anodic peak is from 1 to 8 mM with a coefficient correlation value (R 2 ) of 0.998. These high coefficient correlation values show good linearity from the f-MWCNT/AgNP nanocomposites sensor material at the anodic [51][52][53].…”

Section: Sensing Performance Of F-mwcnt/agnp Nanocomposites Surface-modified Electrodementioning

confidence: 61%

Functionalized multi-walled carbon nanotube/silver nanoparticle (f-MWCNT/AgNP) nanocomposites as non-enzymatic electrochemical biosensors for dopamine detection

et al. 2021

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Dopamine (DA) is an important neurotransmitter in the kidney, cardiovascular system, and central nervous system, which abnormality is associated with many diseases. In this work, we synthesized a functionalized multi-walled carbon nanotube/silver nanoparticle (f-MWCNT/ AgNP) nanocomposites as the biosensing material to detect DA. The SEM, EDS, and TEM characterizations indicated the success of the functionalization process with MWCNT as the base material. The values of the linear range, the limit of detection (LOD), and the selectivity of the nanocomposite were all obtained from the Differential Pulse Voltammetry (DPV) measurements. The obtained LOD value was 0.2778 mM in the linear range of 0-8 mM, which is lower than the required concentration value for detecting DA in human urine (0.3-3 mM). The biosensor's high selectivity on DA with the presence of other human-related biofluids was also reported. These results show that f-MWCNT/AgNP nanocomposites are a promising biosensor material for the detection of DA.

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“…The antifouling properties of the boron-doped diamond electrode are in this case advantageous for the detection of molecules containing hydroxyl groups. These types of molecules usually require undesirable processing steps for the standardly used glassy carbon electrodes (GCE), i.e., mechanical polishing by ultrasonication to eliminate possible passivation of the electrode top surface, as verified for the case of GCE …”

Section: Resultsmentioning

confidence: 99%

“…These types of molecules usually require undesirable processing steps for the standardly used glassy carbon electrodes (GCE), i.e., mechanical polishing by ultrasonication to eliminate possible passivation of the electrode top surface, as verified for the case of GCE. 46 ■ CONCLUSIONS In summary, a new, cost-efficient, and easily implementable method to fabricate NPD using the MSTE process has been presented. We showed that LiNO 3 is a suitable and sp 2 -C selective etchant with a broad temperature processing window for the fabrication of the NPD structure that is not limited to conductive diamond films.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Generation of Nanoporous Diamond Electrodes Fabricated by a Low-Cost Process at Moderate Temperatures

Pfeifer

Szabó

Potocký

et al. 2023

ACS Appl. Eng. Mater.

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A unique approach to fabricate nanoporous diamond morphology using molten salt thermal etching (MSTE) at a moderate temperature (450 °C) of boron-doped ultrananocrystalline diamond (B-UNCD) electrodes is presented. The developed one-step method is simple, environmentally friendly, inexpensive, and provides nanoporous diamond electrodes with nearly unlimited Z-depths. Moreover, it is also applicable to non-conductive diamond films. The appropriate etching mechanism is attributed to the preferential etching of sp 2 carbon phases localized at the grain boundaries by MSTE-generated highly oxidizing species. The fabricated B-UNCD electrodes show an increase in the electrochemical active area (ECSA) of 15% after 3 h of the MSTE treatment, making them promising materials to use as sensors for electroactive species. Such nanoporous B-UNCD presents a favorable working electrode with increased sensitivity for the electrochemical detection of 4nitrophenol. Moreover, the fabricated nanoporous B-UNCD electrode showed 49 times higher capacitance (3534 μF cm −2 ) than the pristine (non-porous) B-UNCD material (71.50 μF cm −2 ).

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Differential pulse voltammetric determination of 4-nitroaniline using a glassy carbon electrode: comparative study between cathodic and anodic quantification

Cited by 18 publications

References 19 publications

Electrodeposition of Silver Amalgam on Thin Gold Film Electrodes for Voltammetric Detection of 4‐Nitrophenol and DNA Labeled with Osmium Tetroxide‐Bipyridine Complex

Electrodeposition of Silver Amalgam on Thin Gold Film Electrodes for Voltammetric Detection of 4‐Nitrophenol and DNA Labeled with Osmium Tetroxide‐Bipyridine Complex

Functionalized multi-walled carbon nanotube/silver nanoparticle (f-MWCNT/AgNP) nanocomposites as non-enzymatic electrochemical biosensors for dopamine detection

Generation of Nanoporous Diamond Electrodes Fabricated by a Low-Cost Process at Moderate Temperatures

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