Bismuth Modified Disposable Pencil‐Lead Electrode for Simultaneous Determination of 2‐Nitrophenol and 4‐Nitrophenol by Net Analyte Signal Standard Addition Method

Asadpour‐Zeynali, Karim; Najafi-Marandi, Parvaneh

doi:10.1002/elan.201100103

Cited by 55 publications

(35 citation statements)

References 31 publications

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“…Irreversibility was indicated by the absence of oxidation peaks in the reverse anodic scan. These results agree with the data obtained with other types of bismuth electrodes (BiFEs and BBEs) [1,[16][17][18][19][20]. Mixtures of the three phenols led to severe peak voltammetric peak overlap (in both the CV and DP voltammetric mode) in which visual peak identification and assignment was impossible.…”

Section: Of the Target Nitrophenols At The Bismuth Oxidemodified Ssupporting

confidence: 93%

“…The mechanism of nitrophenol reduction at bismuth electrodes has been studied and discussed in earlier papers [1,17,18]. In agreement with these studies, single reduction peaks were obtained for both 2-NP and 4-NP while two peaks (I and II) were obtained for 2,4-DNP; peak I corresponds to the reduction of the orthonitro group and peak II to the reduction of the para-nitro group.…”

Section: Of the Target Nitrophenols At The Bismuth Oxidemodified Smentioning

confidence: 59%

“…Initially developed for trace metal analysis by stripping voltammetry, bismuth electrodes have been shown to possess a wide cathodic polarization range similar to that of mercury but applications to organic analysis are rather scarce as demonstrated in a recent review [15]. Regarding the voltammetric determination of nitrophenols, bismuth-film electrodes (BiFEs) preplated on glassy carbon substrates [1,[16][17][18] and bismuth-bulk electrodes (BiBEs) [19,20] have been reported. However, BiFEs preplated on glassy carbon are not disposable and require the use of a separate bismuth plating solution and a bismuth plating step.…”

Section: Introductionmentioning

confidence: 99%

“…in the manufacture of pharmaceuticals, pesticides, pigments, explosives, dyes and rubber chemicals) [1]. They are also formed by hydrolysis or photodegradation of several organophosphorous or nitrophenol-containing pesticides and released from car exhausts [1]. Nitrophenols are potential carcinogens, teratogens and mutagens [2].…”

Section: Introductionmentioning

confidence: 99%

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Screen‐Printed Disposable Sensors Modified with Bismuth Precursors for Rapid Voltammetric Determination of 3 Ecotoxic Nitrophenols

et al. 2014

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This work reports the application of screen‐printed electrodes bulk‐modified with bismuth precursors to the voltammetric determination of 2‐nitrophenol (2‐NP), 4‐nitrophenol (4‐NP) and 2,4‐dinitrophenol (2,4‐DNP) in water samples. A bismuth film was formed at the electrode surface via in situ reduction of the precursor compound contained in the electrode matrix by cathodic polarization at −1.20 V. The formation of bismuth layer at the precursor‐modified electrodes was assessed by cyclic voltammetric (CV) at different pH values and by optical techniques. The target nitrophenols were voltammetrically determined by recording their reduction peaks in the differential pulse (DP) mode. The composition and content of the precursor compounds in the printed ink and the effect of the pH of the supporting electrolyte on the DP reduction currents of the 3 target nitrophenols were studied. The limits of quantification (LOQs) in three water matrices (distilled water, tap water and surface water) were in the range 1.1–2.2 µmol L−1. Using a simple solid‐phase extraction (SPE) procedure with Lichrolut EN cartridges and elution with methanol, a preconcentration factor of 100 was achieved; the LOQs were 0.021, 0.027 and 0.025 µmol L−1 for 2‐NP, 4‐NP and 2,4‐DNP, respectively. The recoveries of samples spiked with the 3 target nitrophenols at two concentration levels (0.04 and 0.1 µmol L−1) were always >87 %.

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Section: Of the Target Nitrophenols At The Bismuth Oxidemodified Ssupporting

confidence: 93%

Section: Of the Target Nitrophenols At The Bismuth Oxidemodified Smentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Screen‐Printed Disposable Sensors Modified with Bismuth Precursors for Rapid Voltammetric Determination of 3 Ecotoxic Nitrophenols

et al. 2014

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“…10,11 Therefore, NP has been listed as a priority pollutant by the United States Environmental Protection Agency (USEPA). 12,13 However, the toxicity of nitrophenol isomers is different; o-NP and p-NP are highly toxic and exhibit much more serious impact on the growth and metabolic activities of the organism. 14, 15 The permissible limit of NP in the environment has been given.…”

Section: Introductionmentioning

confidence: 99%

A new strategy for the sensitive electrochemical determination of nitrophenol isomers using β-cyclodextrin derivative-functionalized silicon carbide

Fan

Tan

et al. 2018

RSC Adv.

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In the present study, thiol b-cyclodextrin (SH-CD) and ethylenediamine b-cyclodextrin (NH 2 -b-CD) were simultaneously grafted on the same interface of an Au NP deposited carboxyl SiC (Au@CSiC)nanocomposite. An electrochemical sensor for the simultaneous determination of nitrophenol isomers (onitrophenol, o-NP; p-nitrophenol, p-NP) using SH-CD and NH 2 -b-CD functionalized Au@SiC (Au@CSiC-SH/NH 2 -CD) nanocomposite was successfully constructed. Differential pulse voltammetry was used to quantify o-NP and p-NP within the concentration range of 0.01-150 mM under the optimal conditions. The detection limit (S/N ¼ 3) of the sensor was 0.019 and 0.023 mM for o-NP and p-NP, respectively, indicating a low detection limit. Interference study results demonstrated that the sensor was not affected in the presence of similar aromatic compounds during the determination of NP isomers, showing high selectivity. The proposed electrochemical sensing platform was successfully used to determine NP isomers in tap water. The low detection limit and high selectivity of the proposed electrochemical sensor were caused by the high surface area, the excellent conductivity, and the more recognized (enriched) NP isomer molecules by SH-b-CD and NH 2 -b-CD of the Au@CSiC-SH/NH 2 -CD nanocomposite.

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Electrochemical Detection of 2‐Nitrophenol Using a Glassy Carbon Electrode Modified with BaO Nanorods

Alam

Asiri

Rahman

2021

Chemistry An Asian Journal

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Here, an electrochemical detection approach (differential pulse voltammetry) was employed to develop a 2nitrophenol (2-NP) sensor probe using a glassy carbon electrode (GCE) coated by wet-chemically synthesized nanorods (NRs) of BaO. The prepared BaO NRs were characterized by field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and powder X-ray diffraction (XRD) analysis. The peak currents by differential pulse voltammetric (DPV) analysis of 2-NP are plotted against the concentration to obtain the calibration curve of the 2-NP detection. It was found to be linear from 1.5 to 9.0 μM, defined as the dynamic range (LDR) for 2-NP detection in phosphate buffer solution. The sensor sensitivity was calculated from the slope of LDR by considering the active surface area of NRs coated on GCE (0.0316 cm 2 ) and found as 17.6 μAμM À 1 cm À 2 . The limit of detection (LOD) was calculated as 0.50 � 0.025 μM from the signal/noise (S/N) ratio of 3. Moreover, the sensor analytical parameters such as reproducibility, long-term performing ability (stability), response time and validity in real environmental samples were found acceptable and to give satisfactory results. The development of a nanomaterial-based electrochemical chemical sensor might be an effective approach to sensor technology to detect carcinogenic and hazardous toxins for environmental safety and healthcare fields in a broad scale.

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Bismuth Modified Disposable Pencil‐Lead Electrode for Simultaneous Determination of 2‐Nitrophenol and 4‐Nitrophenol by Net Analyte Signal Standard Addition Method

Cited by 55 publications

References 31 publications

Screen‐Printed Disposable Sensors Modified with Bismuth Precursors for Rapid Voltammetric Determination of 3 Ecotoxic Nitrophenols

Screen‐Printed Disposable Sensors Modified with Bismuth Precursors for Rapid Voltammetric Determination of 3 Ecotoxic Nitrophenols

A new strategy for the sensitive electrochemical determination of nitrophenol isomers using β-cyclodextrin derivative-functionalized silicon carbide

Electrochemical Detection of 2‐Nitrophenol Using a Glassy Carbon Electrode Modified with BaO Nanorods

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