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Title of Journal: J Solid State Electrochem

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Abbravation: Journal of Solid State Electrochemistry

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Springer-Verlag

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DOI

10.1016/0019-1035(78)90084-2

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1433-0768

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Cobalt oxide nanostructuremodified glassy carbon

Authors: Abdollah Salimi Rahman Hallaj
Publish Date: 2011/08/17
Volume: 16, Issue: 3, Pages: 1239-1246
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Abstract

Glassy carbon electrode modified with electrodeposited cobalt oxide nanostructure shows an excellent electrocatalytic activity toward insulin oxidation at a wide pH range Cyclic voltammetry hydrodynamic amperometry and flow injection analysis FIA were used for insulin determination at a picomolar and higherconcentration range Amperometric determination of insulin at this modified electrode yielded a calibration curve with the following characteristics linear range 100 pM–15 nM sensitivity of 839 nA nM−1 and detection limit 10 pM FIA yielded the calibration curve with sensitivity and detection limit of 20 nA nM−1 and 25 pM respectively Furthermore the RSD of repetitive FIA for 200 pM insulin n = 13 is 2 In addition the interference effect of electroactive existing species lactic acid cholesterol ascorbic acid uric acid and glucose was eliminated by covering the surface of the modified electrode with nafion film Fast response time signal stability high sensitivity low cost and ease of preparation are the advantages of the proposed insulin sensor

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  15. Development of nano IrO 2 composite-reinforced nickel–phosphorous electrodes for hydrogen evolution reaction
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