Bimetallic CoPt nanoparticles-modified Pt disk electrode for the amperometric sensing of ascorbic acid

Doulache, Merzak; Trari, M.; Saidat, Boubakeur

doi:10.1007/s12039-018-1513-5

Cited by 5 publications

(1 citation statement)

References 36 publications

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“…There are many methods used for the determination of these substances, including spectrophotometric determination of AA [4][5][6][7][8][9], and several other analytical methods including flow injection analysis [10][11][12][13][14][15][16][17][18][19], titrimetric [20][21][22][23][24][25], electrochemical [26][27][28][29][30][31][32], fluorimetric [33][34][35] and HPLC [36][37][38][39][40][41][42] methods.…”

Section: Introductionmentioning

confidence: 99%

Double injection–single detector flow injection spectrophotometric method for simultaneous determination of ascorbic acid and paracetamol in pharmaceutical formulations

Muhammad

Faizullah

2019

J IRAN CHEM SOC

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A simple and low-cost flow injection spectrophotometric method was proposed for the simultaneous determination of ascorbic acid (AA) and paracetamol (PCM) in pharmaceutical formulations. The present method is based on the reduction of Fe(III) to Fe(II) with AA and PCM in a closed flow system which subsequently combines with the 1,10-phenanthroline to form an orange-coloured complex that is measured at 510 nm. The increase in the absorbance was proportional to the concentration of AA in the range of 0.1-12 µg/ml with a correlation coefficient of 0.9997 and detection limit of 0.31 µg/ml, and to the concentration of PCM in the range of 0.4-24 µg/ml with a correlation coefficient of 0.9999 and detection limit of 0.39 µg/ml. The precision for ten serial estimations of 2 and 7 µg/ml of AA exhibited a relative standard deviation of 3.33% and 2.47% and of 6 and 15 µg/ml of PCM with a relative standard deviation of 3.008% and 2.23%, respectively. The present FI method permits determination of 9 samples per hour with no interference from the common excipients. The developed method was applied to different tablets containing AA and PCM with the recovery of AA from four spiked samples ranged from 95.31 to 104.73%, and of PCM ranged from 95.03 to 104.93%.

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Section: Introductionmentioning

confidence: 99%

Double injection–single detector flow injection spectrophotometric method for simultaneous determination of ascorbic acid and paracetamol in pharmaceutical formulations

Muhammad

Faizullah

2019

J IRAN CHEM SOC

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High‐Performance Piezo‐Electrocatalytic Sensing of Ascorbic Acid with Nanostructured Wurtzite Zinc Oxide

et al. 2021

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plays a vital role in biological metabolisms, for example, the digestion of amino acids, as well as the synthesis of adrenalin, certain hormones, and neurotransmitters. [2] AA has also been commonly used for the prevention and treatment of scurvy, [3] cancer, [4] common cold, [5] and AIDS, [6] etc. The design and implementation of cost-effective, high-performance electrochemical sensors for the rapid and accurate quantification of AA concentration in foods or biological fluids are important for many societally pervasive applications such as clinical diagnostics, [7] wearable health monitoring, [8] food safety, [9] and environmental monitoring. [10] However, the direct electrooxidation of AA on the surface of the bare electrodes is irreversible. [11] Moreover, the subsequent hydrolysis of the reaction will cause electrode fouling with large overpotential, poor selectivity, low sensitivity, and unsatisfactory reproducibility. [12] Nanostructured catalysts with large specific surfaces and abundant active sites appeal to highly sensitive electrochemical sensing of various chemicals. Various nanomaterials, such as conducting polymers, [13] carbon materials, [14] and metal oxides, [15] have been explored for modifying the electrodes to efficiently detect AA, Nanostructured piezoelectric semiconductors offer unprecedented opportunities for high-performance sensing in numerous catalytic processes of biomedical, pharmaceutical, and agricultural interests, leveraging piezocatalysis that enhances the catalytic efficiency with the strain-induced piezoelectric field. Here, a cost-efficient, high-performance piezo-electrocatalytic sensor for detecting l-ascorbic acid (AA), a critical chemical for many organisms, metabolic processes, and medical treatments, is designed and demonstrated. Zinc oxide (ZnO) nanorods and nanosheets are prepared to characterize and compare their efficacy for the piezo-electrocatalysis of AA. The electrocatalytic efficacy of AA is significantly boosted by the piezoelectric polarization induced in the nanostructured semiconducting ZnO catalysts. The charge transfer between the strained ZnO nanostructures and AA is elucidated to reveal the mechanism for the related piezo-electrocatalytic process. The lowtemperature synthesis of high-quality ZnO nanostructures allows low-cost, scalable production, and integration directly into wearable electrocatalytic sensors whose performance can be boosted by otherwise wasted mechanical energy from the working environment, for example, human-generated mechanical signals.

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Recent advances in bimetallic based nanostructures: Synthesis and electrochemical sensing applications

Rajeev

Datta

Varghese

et al. 2021

Microchemical Journal

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Bimetallic CoPt nanoparticles-modified Pt disk electrode for the amperometric sensing of ascorbic acid

Cited by 5 publications

References 36 publications

Double injection–single detector flow injection spectrophotometric method for simultaneous determination of ascorbic acid and paracetamol in pharmaceutical formulations

Double injection–single detector flow injection spectrophotometric method for simultaneous determination of ascorbic acid and paracetamol in pharmaceutical formulations

High‐Performance Piezo‐Electrocatalytic Sensing of Ascorbic Acid with Nanostructured Wurtzite Zinc Oxide

Recent advances in bimetallic based nanostructures: Synthesis and electrochemical sensing applications

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