A novel nanosilver/nafion composite electrode for electrochemical sensing of methyl parathion and parathion

Kumaravel, A.; Chandrasekaran, M.

doi:10.1016/j.jelechem.2009.11.002

Cited by 78 publications

(40 citation statements)

References 27 publications

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“…This reduction current is much higher than the reduction current reported earlier [15]. The enhanced reduction current is due to the easy penetration of protonated fenitrothion molecules [22,56,70] through the cation exchange nafion membrane. Moreover, the TiO 2 nanoparticles are also having more affinity towards the organophosphorus compounds [46].…”

Section: Cyclic Voltammetric Response Of Fenitrothion At Nano Tio 2 /contrasting

confidence: 54%

“…The nano TiO 2 /nafion has been used as the sensing anode for nitric oxide detection [55]. In our earlier report, the nanosilver/nafion composite modified glassy carbon electrode was successfully employed for the electrochemical sensing of methyl parathion and parathion [56]. In continuation of our efforts for the development of nanomaterials based sensor for pesticides a nano TiO 2 /nafion composite modified glassy carbon electrode (GCE) for the electrochemical sensing of fenitrothion is reported in this paper.…”

Section: Introductionmentioning

confidence: 88%

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A biocompatible nano TiO2/nafion composite modified glassy carbon electrode for the detection of fenitrothion

Kumaravel

Chandrasekaran

2011

Journal of Electroanalytical Chemistry

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Section: Cyclic Voltammetric Response Of Fenitrothion At Nano Tio 2 /contrasting

confidence: 54%

Section: Introductionmentioning

confidence: 88%

A biocompatible nano TiO2/nafion composite modified glassy carbon electrode for the detection of fenitrothion

Kumaravel

Chandrasekaran

2011

Journal of Electroanalytical Chemistry

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“…Nano-Ag was prepared using previously published method. 23 Briefly, Manually cleaned Pt electrode was dipped into solution containing 1 mM AgNO 3 and 0.1 ml 5% Nafion in 10 ml and applied constant potential (−1 V) in 120 s time duration using controlled potential electrolysis method with reference to Ag/AgCl electrode. Here, glassy carbon electrode (GCE) served as counter electrode.…”

Section: Methodsmentioning

confidence: 99%

Nano-Ag-Nafion Modified Pt Electrode for Oxidation of Volatile Organic Compounds: An Electrochemical Study

Muthuraman

Chung²,

Moon³

2011

J. Nanosci. Nanotech.

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In this work, we describe Nano-Ag-Nafion coated pt electrode for oxidation of volatile organic compound (VOC), here acetaldehyde. Electrochemically synthesized Nano-Ag-Nafion film on Pt was analyzed by electrochemically in various electrolyte solutions like nitric acid, sulfuric acid, potassium nitrate, and potassium hydroxide for its stability. High stability of Nano-Ag-Nafion film appeared in potassium hydroxide medium among electrolyte solutions studied. Electrocatalysis of acetaldehyde was occurred only in acid and neutral medium. A catalytic oxidative peak during cathodic voltammetric reduction scan was observed at 1.75 V, which, unusual redox behavior, follows EC' reaction path way between electrogenerated Ag(II) and acetaldehyde. For Nano-Ag potential applicability, a calibration plot was drawn from various concentration range of acetaldehyde to check the maximum concentration level of acetaldehyde degradation in air.

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“…Alternatively, electroanalytical biosensors can offer an excellent alternative due to their diverse advantages including compact nature, rapid response, low cost, low power consumption and easy handling in field trials. In spite of the superb reduction-oxidation activities of parathion and methyl parathion at the electrode surface, fouling problem due to the large molecular size can often occur and several attempts have been taken to overcome this using modified electrodes [9][10][11].…”

Section: Parathion (Oo-diethyl-o(4-nitrophenyl) Thiophosphate) and Mmentioning

confidence: 99%

Amperometric Detection of Parathion and Methyl Parathion with a Microhole‐ITIES

et al. 2011

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An amperometric sensor featuring a microhole-liquid/gel interface for the detection of both parathion and methyl parathion is developed on the basis of their different kinetics behavior when interacting with the enzyme organophosphorus hydrolase (OPH). OPH hydrolyzes parathion and methyl parathion producing a common product of para-nitrophenol and either diethylthio-or dimethylthio-phosphoric acid, respectively, of which all can release protons depending upon their pKa values. The detection method for both organophosphate (OP) compounds is designed to measure the current associated with the transfer of protons released from the products of OPH hydrolysis across a polarized microhole-water/polyvinylchloride-nitrophenyloctylether (PVC-NOPE) gel interface. The selective transfer of protons across the interface is tailored by the use of a proton selective ligand, ETH 1778, in the gel layer. A disposable proton selective sensor that can quantitatively analyze the OP compounds is also fabricated using simple polydimethylsiloxane microfabrication. Cyclic voltammetry and differential pulse stripping voltammetry are first utilized to characterize the transfer of protons across the microhole-water/PVC-NPOE gel interface initiated by the OPH reaction with parathion and methyl parathion and to establish a detection limit for each OP compound. In order to sequentially detect parathion and methyl parathion using a single proton selective stripsensor, a novel time-resolved detection methodology is developed based on the different catalytic kinetics of OPH with each OP analyte; the maximum peak current for the preconcentrated protons transferring back from the organic to water phase assisted by ETH 1778 increases proportionally to the concentration of each OP agent. Since the maximum peak currents for both OP analytes are observed at different reaction times it was possible to demonstrate the multiplexed analysis of both parathion and methyl parathion down to 0.5 mM using a single sensor.

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A novel nanosilver/nafion composite electrode for electrochemical sensing of methyl parathion and parathion

Cited by 78 publications

References 27 publications

A biocompatible nano TiO2/nafion composite modified glassy carbon electrode for the detection of fenitrothion

A biocompatible nano TiO2/nafion composite modified glassy carbon electrode for the detection of fenitrothion

Nano-Ag-Nafion Modified Pt Electrode for Oxidation of Volatile Organic Compounds: An Electrochemical Study

Amperometric Detection of Parathion and Methyl Parathion with a Microhole‐ITIES

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