Sensitive simultaneous determination of nitrophenol isomers at poly(p-aminobenzene sulfonic acid) film modified graphite electrode

Yao, Chuan; Sun, Hong; Fu, Huafeng; Tan, Zhi‐Cheng

doi:10.1016/j.electacta.2015.01.043

Cited by 54 publications

(19 citation statements)

References 29 publications

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“…The nitrophenol isomers electrochemical behavior has been extensively studied and discussed in the literature till now . As shown in Figure , a reduction peak R appears on the cyclic voltammetry curve for each of the phenolic isomers at the first forward (cathodic) scan.…”

Section: Resultsmentioning

confidence: 99%

“…The detection limit of the nitrophenol isomers determinations reported in the literature varies as follows : 0.01 μmol L −1 to 8 μmol L −1 for o‐NP, 0.044 μmol L −1 to 6 μmol L −1 for m‐NP, and 0.01 μmol L −1 to 8 μmol L −1 for p‐NP. The values found in this work were 1.5 μmol L −1 , 2.5 μmol L −1 , and 0.5 μmol L −1 for o‐NP, m‐NP, and p‐NP, respectively (S/N=3).…”

Section: Resultsmentioning

confidence: 99%

“…The currently applied analytical methods for nitrophenols quantification are spectrophotometric , chromatographic , and electrochemical , as well as flow‐injection analysis , and capillary electrophoresis . Among them the electrochemical techniques and especially the voltammetry attract the attention, due to their cost efficiency, rapid response, simple operation, and on‐site application ability.…”

Section: Introductionmentioning

confidence: 99%

“…The main difficulty associated with the voltammetric simultaneous determination of the nitrophenol isomers is the insufficient resolution of the nitrophenols overlapped peaks and hence, the low quantification precision. This problem was overcome by signal differentiation or by the application of chemically modified electrodes with improved performances, or both . However, the differentiation presents important disadvantages in increased noise level or insufficient number of sampling points .…”

Section: Introductionmentioning

confidence: 99%

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Resolution of a Mononitrophenol Isomers Mixture by Differential Alternative Pulses Voltammetry

et al. 2019

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The high resolution second order voltammetric technique, Differential Alternative Pulse Voltammetry (DAPV), was applied for the simultaneous quantification of the mononitrophenol (NP) isomers. Complete resolution of the three isomers was achieved at concentration ratios as high as 1 : 5, employing the corresponding anodic and cathodic peaks appeared on the DAPV curve. The working glassy carbon electrode was modified by a nanocomposite of graphite nanopowder and Au nanoparticles to increase the sensitivity. The linear concentration range was found to be extended up to 125 μmol L−1 for both the m‐NP and p‐NP isomers, while the o‐NP isomer presented calibration plot of two linear sections: up to 100 μmol L−1 and up to 225 μmol L−1. The LOD was found to be as low as 1.5 μmol L−1, 2.5 μmol L−1, and 0.5 μmol L−1 for o‐NP, m‐NP, and p‐NP, respectively. The accuracy of the proposed method was evaluated by quantification of spiked tap waters samples. No interference was observed from a range of phenolic compounds such as phenol, 4‐aminophenol, 4‐chlorophenol, 2,4‐dinitrophenol, and resorcinol.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Resolution of a Mononitrophenol Isomers Mixture by Differential Alternative Pulses Voltammetry

et al. 2019

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“…In the last decade, electrode modification through the immobilization of different species on the electrode surface has caused great interest in the development of new electrochemical sensors for the detection and quantification of different analytes in solution [19][20][21]. Thus, an essential aspect in the design of these new sensors is the molecule immobilization procedure.…”

Section: Introductionmentioning

confidence: 99%

Voltammetric Determination of Anti-Hypertensive Drug Hydrochlorothiazide Using Screen-Printed Electrodes Modified with L-Glutamic Acid

et al. 2017

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This work deals with the development of screen-printed carbon electrodes modified with L-glutamic acid via two different approaches: electropolymerization (SPCE/PGA) and aryl diazonium electrochemical grafting (SPCE/EGA). SPCE/PGA and SPCE/EGA were analytically compared in the determination of hydrochlorothiazide (HCTZ) by differential pulse voltammetry. Both electrochemical characterization and analytical performance indicate that SPCE/EGA is a much better sensor for HCTZ. The detection and quantification limits were at the level of µmol L −1 with a very good linearity in the studied concentration range. In addition, the proposed SPCE/EGA was successfully applied for the determination of HCTZ in an anti-hypertensive drug with high reproducibility and good trueness.

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Electrochemical Sensor for Detection of p‐Nitrophenol Based on Nickel Oxide Nanoparticles/α‐Cyclodextrin Functionalized Reduced Graphene Oxide

et al. 2020

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p‐Nitrophenol (p−NP) is a high priority toxic pollutant and that has harmful effects on human, animals and plants. Thus, the detection and determination of p−NP present in the environment is an urgent as well as highly important requisite. The present article, therefore focused on the construction of a novel electrochemical sensor based on NiO nanoparticles/α‐cyclodextrin functionalized reduced graphene oxide modified glassy carbon electrode (NiO−NPs‐α‐CD‐rGO‐GCE) for the selective and sensitive detection of p−NP. UV‐vis, high resolution transmission electron microscopy (HR‐TEM), selected area electron diffraction pattern (SAED) and X‐ray diffraction (XRD) analysis confirms the formation of highly pure NiO nanoparticles. Field emission scanning electron microscopy (FE‐SEM), energy dispersive X‐ray spectroscopy (EDS), and cyclic voltammetry (CV) were used to characterize the step‐wise electrode modification process. DPV was carried out to quantify p−NP within the concentration range of 1−10 μM and found the detection limit of 0.12 nM on the basis of the signal‐to‐noise ratio S/N=3. The electrode can able to detect different isomers of nitrophenols. Interferences of other pollutants such as phenol, p‐aminophenol, o‐ and m‐ nitrophenol, 4‐chlorophenol, 2,6‐dichlorophenol and ions like K+, Cd2+, Cl−, SO42− did not affect the sensing of p−NP. The newly developed sensor exhibited diffusion controlled kinetics and had excellent sensitivity, selectivity and reproducibility for the detection of p−NP. The electrode showed good recoveries in real sample analysis.

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Sensitive simultaneous determination of nitrophenol isomers at poly(p-aminobenzene sulfonic acid) film modified graphite electrode

Cited by 54 publications

References 29 publications

Resolution of a Mononitrophenol Isomers Mixture by Differential Alternative Pulses Voltammetry

Resolution of a Mononitrophenol Isomers Mixture by Differential Alternative Pulses Voltammetry

Voltammetric Determination of Anti-Hypertensive Drug Hydrochlorothiazide Using Screen-Printed Electrodes Modified with L-Glutamic Acid

Electrochemical Sensor for Detection of p‐Nitrophenol Based on Nickel Oxide Nanoparticles/α‐Cyclodextrin Functionalized Reduced Graphene Oxide

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