Fast Electrochemical Determination of Imidacloprid at an Activated Glassy Carbon Electrode

Si, Weimeng; Han, Zhen; Lei, Wu; Wu, Qiuju; Zhang, Yuehua; Xia, Mingzhu; Hao, Qingli

doi:10.1149/2.026401jes

Cited by 21 publications

(11 citation statements)

References 39 publications

(41 reference statements)

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“…The more oxygen-containing groups are beneficial for the adsorption of UA and DA through hydrogen bonds. In our previous work [34], the similar activation of carbon materials at high potential could improve the electrocatalysis of electrodes imidacloprid.…”

Section: Resultsmentioning

confidence: 99%

Simultaneous Detection of Dopamine and Uric Acid Using a Poly(l-lysine)/Graphene Oxide Modified Electrode

Zhang

Lei

et al. 2016

Nanomaterials

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A novel, simple and selective electrochemical method was investigated for the simultaneous detection of dopamine (DA) and uric acid (UA) on a poly(l-lysine)/graphene oxide (GO) modified glassy carbon electrode (PLL/GO/GCE) by differential pulse voltammetry (DPV). The electrochemically prepared PLL/GO sensory platform toward the oxidation of UA and DA exhibited several advantages, including high effective surface area, more active sites and enhanced electrochemical activity. Compared to the PLL-modified GCE (PLL/GCE), GO-modified GCE and bare GCE, the PLL/GO/GCE exhibited an increase in the anodic potential difference and a remarkable enhancement in the current responses for both UA and DA. For the simultaneous detection of DA and UA, the detection limits of 0.021 and 0.074 μM were obtained, while 0.031 and 0.018 μM were obtained as the detection limits for the selective detection of UA and DA, using DPV in the linear concentration ranges of 0.5 to 20.0 and 0.5 to 35 μM, respectively. In addition, the PLL/GO/GCE demonstrated good reproducibility, long-term stability, excellent selectivity and negligible interference of ascorbic acid (AA). The proposed modified electrode was successfully implemented in the simultaneous detection of DA and UA in human blood serum, urine and dopamine hydrochloride injection with satisfactory results.

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Section: Resultsmentioning

confidence: 99%

Simultaneous Detection of Dopamine and Uric Acid Using a Poly(l-lysine)/Graphene Oxide Modified Electrode

Zhang

Lei

et al. 2016

Nanomaterials

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“…0.08 mM. Compared with some other modied electrodes, such as nanosilver-Naon/nanoTiO 2 -Naon composite modi-ed GCE, 8 molecularly imprinted poly(o-phenylendiamine)graphene modied electrode, 9 b-cyclodextrin polymer functionalized graphene modied electrode, 31 poly(carbazole)/ chemically reduced graphene oxide modied GCE 32 and activated GCE, 33 the MWNTs@RAFT-MIP-GR-IL/GCE showed a relatively wide linear range and a lower detection limit (Table S1 †).…”

Section: Optimization Of Preparation and Determination Conditionsmentioning

confidence: 99%

Preparation of hydrophilic surface-imprinted ionic liquid polymer on multi-walled carbon nanotubes for the sensitive electrochemical determination of imidacloprid

Zhao

Yang

et al. 2017

RSC Adv.

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“…Various methods based on different analytical procedures have been described in literature for the determination of methimazole including Ultraviolet-Visible (UV-Vis) spectrophotometry [2][3][4][5][6][7], derivative spectrophotometry [8], Raman spectroscopy [9,10], resonance light scattering spectroscopy [11], chemiluminescence [12][13][14], fluorescence [15,16], capillary electrophoresis [17], immunoassay [18], molecularly imprinted biomimetic sensing [19], Thin Layer Chromatography (TLC) [20] and High Performance Liquid Chromatography (HPLC) [21][22][23][24][25]. Methimazole has been also determined using electrochemical methods by using different chemically modified electrodes through introducing various electron mediators on its surface [26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Novel Selective Spectrophotometric Methods for the Determination of Methimazole in Pure Form and in Pharmaceutical Formulation

Bathish

Gazy

Jamal

2019

Int J Pharm Pharm Sci

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Objective: To develop and validate new, selective spectrophotometric colorimetric analytical methods for the quantification of methimazole in its pure form and in its pharmaceutical preparations. Methods: Method A is based on the oxidation of methimazole with potassium permanganate in alkaline medium, the manganate ion produced was measured at λmax= 610 nm. Method B is a kinetic determination of methimazole using fixed-time method based on the oxidation of methimazole using known excess of cerium (IV) nitrate in acidic medium and assessing the unreacted Ce (IV) by adding a fixed amount of methyl orange and measuring the absorbance of the resultant solution at λmax=507 nm which is equivalent to the unreacted methyl orange. The reaction conditions and analytical parameters are investigated and optimized. Method validation was carried out according to ICH guidelines in terms of linearity, LOD, LOQ, precision, and accuracy. Results: Beer’s law is obeyed in the range of 1.50–15.00 μg/ml for method A and 0.25–3.00 μg/ml for method B. The developed methods were subjected to the detailed validation procedure. The proposed spectrophotometric methods were applied for the determination of the methimazole in its pure form and in its pharmaceutical formulation. The percentage recoveries were found to be 100.82 % and 99.85 % in the pharmaceutical formulation for the two proposed methods, respectively. Conclusion: Both developed spectrophotometric methods, considered as green analytical chemistry, were found to be novel, highly selective and can be applied for the quality control of methimazole in its pure form and in its pharmaceutical formulation based on the simplicity, applicability of the parameters, accessibility of the reagents employed and reasonably low time of analysis.

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Fast Electrochemical Determination of Imidacloprid at an Activated Glassy Carbon Electrode

Cited by 21 publications

References 39 publications

Simultaneous Detection of Dopamine and Uric Acid Using a Poly(l-lysine)/Graphene Oxide Modified Electrode

Simultaneous Detection of Dopamine and Uric Acid Using a Poly(l-lysine)/Graphene Oxide Modified Electrode

Preparation of hydrophilic surface-imprinted ionic liquid polymer on multi-walled carbon nanotubes for the sensitive electrochemical determination of imidacloprid

Novel Selective Spectrophotometric Methods for the Determination of Methimazole in Pure Form and in Pharmaceutical Formulation

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