Poly(diphenylamine-4-sulfonic acid) modified glassy carbon electrode for voltammetric determination of gallic acid in honey and peanut samples

Bitew, Zelalem; Kassa, Adane; Misgan, Beyene

doi:10.1016/j.arabjc.2022.103853

Cited by 13 publications

(4 citation statements)

References 36 publications

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“…Adsorptive stripping square wave voltammetric (AdSSWV) method, which is effective and rapid electroanalytical technique due to its ability to discriminate against back ground currents, good sensitivity and low detection limits,[ 26 , 29 , 30 ] was selected for the quantitative determination of CQP in tablet formulations, human blood serum, and urine samples. Figure 12 shows AdSSWV of 1.0 m m CQP in pH 7.5 PBS at bare GCE and poly(DHRPCo)/GCE.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Determination of Chloroquine Phosphate in Real Samples Using a Diresorcinate‐1,10‐phenanthrolinecobalt(II)‐Modified Glassy Carbon Electrode

2023

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Chloroquine phosphate (CQP) is used for malaria treatment. As it is facing increasing resistance, it needs continuous monitoring using sensitive and specific detection methods. In this work, a voltammetric sensor was prepared by electropolymerization of a diresorcinate‐1,10‐phenanthrolinecobalt(II) complex on a glassy carbon electrode (poly(DHRPCo)/GCE) which was followingly characterized. Compared with a bare GCE, CQP showed single well shaped irreversible oxidative peak at the poly(DHRPCo)/GCE. The peak current showed excellent linearity with CQP concentration in the range of 0.005–300.0 μ m with a detection limit of 0.39 n m . The response of CQP at poly(DHRPCo)/GCE was not influenced by the presence of amoxicillin, ciprofloxacillin and paracetamol in addition to its high stability and reproducibility. It was applied for detection of CQP in various real samples, including three brands of tablets, human blood serum, and urine samples. The detected amount in tablets were in the range 98.4–103.2 % of their labeled value. Spike recovery results in human blood serum, urine, and tablet samples were 99.35–100.28 %, 99.03–100.32 %, and 98.40–100.41 %, respectively. Interference recovery results with less than 4.60 % error, the lower limit of detection and the wider dynamic range than most of the previously reported methods validate the potential applicability of the proposed method for CQP determination in various real samples with complex matrices.

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Section: Resultsmentioning

confidence: 99%

Electrochemical Determination of Chloroquine Phosphate in Real Samples Using a Diresorcinate‐1,10‐phenanthrolinecobalt(II)‐Modified Glassy Carbon Electrode

2023

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“…Unfortunately, all these methods need tedious sample preparation, are timeconsuming, require complex analytical equipment, and consume large amounts of organic solvents (non-eco-friendly). 10,11 On the contrary, electrochemical methods are more appealing than conventional methods because they are easy to use, inexpensive, repeatable, very sensitive, quick to analyze, and environmentally safe. 12−14 There have been attempts to use voltammetric techniques to determine CLN in various real samples.…”

Section: Introductionmentioning

confidence: 99%

“…Spectrophotometry, hyphenated methods, and chromatography are among the common techniques reported for the determination of CLN in different samples. Unfortunately, all these methods need tedious sample preparation, are time-consuming, require complex analytical equipment, and consume large amounts of organic solvents (non-eco-friendly). , On the contrary, electrochemical methods are more appealing than conventional methods because they are easy to use, inexpensive, repeatable, very sensitive, quick to analyze, and environmentally safe. − …”

Section: Introductionmentioning

confidence: 99%

“…There have been attempts to use voltammetric techniques to determine CLN in various real samples. , Via increasing its compatibility, electron conductivity, and surface area, surface modification often enhances the electrochemical performance of a working electrode. − In this regard the use of conducting polymers as electrode modifiers has drawn a lot of interest due to their good chemical stability, electrical conductivity, reproducibility, improved sensitivity, excellent biocompatibility, electrocatalysis, and strong adhesion to the electrode surface compared with a conventional electrode. ,− Dipicrylamine (2,4,6-2′,4′,6′-hexanitrodiphenylamine) is a conducting polymer containing two trinitrobenzene units with secondary amine functional groups (−NH−), available for electropolymerization, and can be used as a sensor in electrochemical techniques; − for sensing purposes only limited work is found.…”

Section: Introductionmentioning

confidence: 99%

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Highly Specific Voltammetric Detection of Cephalexin in Tablet Formulations and Human Urine Samples Using a Poly(2,4,6-2′,4′,6′-hexanitrodiphenylamine)-Modified Glassy Carbon Electrode

Kassa,

Enday

2024

ACS Omega

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β-Lactam antibiotics are employed to treat bacterial illnesses. Despite a high level of clinical success, they have encountered serious resistance that demands a high-dose regimen and a new pharmacokinetic combination. This requires continuous monitoring of their levels in pharmaceutical and biological samples. In this study, an electrochemical sensor was developed for the determination of cephalexin (CLN) in pharmaceutical formulations and biological fluid samples. The sensors were developed by modifying a glassy carbon electrode (GCE) using a conducting polymer (dipicrylamine) by potentiodynamic electropolymerization. Characterization (using cyclic voltammetry and electron impedance spectroscopy) results revealed modification of the electrode surface, leading to an enhanced effective electrode surface area and their conductivity. The appearance of an irreversible oxidative peak at much-reduced potential with 5-fold current enhancement at a poly(dipicrylamine)-modified glassy carbon electrode (poly(DPA)/GCE) verified the electrocatalytic role toward CLN. Under optimized conditions, a wider linear concentration range (5 × 10 −8 to 3.0 × 10 −4 M), lowest limit of detection (LoD) (2.5 nM), detected amount of each tablet brand above 97.00% of the labeled value (showing excellent agreement between the detected amount and company label), and excellent % recovery results in pharmaceutical and biological samples were obtained with an excellent interference recovery error of less than 4.05%. Its excellent accuracy, selectivity, reproducibility, and stabilities and only requiring a simple electrode modification step combined with its readily available and nontoxic modifier, which sets it apart from most previously reported methods, have validated the present method's potential applicability for determining CLN in biological and pharmaceutical samples.

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Extremely adherent and protective polymeric coating based on polydiphenylamine electrodeposited on steel in an organic electrolytic medium

et al. 2022

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Poly(diphenylamine-4-sulfonic acid) modified glassy carbon electrode for voltammetric determination of gallic acid in honey and peanut samples

Cited by 13 publications

References 36 publications

Electrochemical Determination of Chloroquine Phosphate in Real Samples Using a Diresorcinate‐1,10‐phenanthrolinecobalt(II)‐Modified Glassy Carbon Electrode

Electrochemical Determination of Chloroquine Phosphate in Real Samples Using a Diresorcinate‐1,10‐phenanthrolinecobalt(II)‐Modified Glassy Carbon Electrode

Highly Specific Voltammetric Detection of Cephalexin in Tablet Formulations and Human Urine Samples Using a Poly(2,4,6-2′,4′,6′-hexanitrodiphenylamine)-Modified Glassy Carbon Electrode

Extremely adherent and protective polymeric coating based on polydiphenylamine electrodeposited on steel in an organic electrolytic medium

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