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Title: Catechol encapsulated surfactant film modified glassy carbon electrode to detect thiourea at 10-7 M level
Authors: Bhattacharjya, Rimki
Das, Diganta Kumar
Keywords: Catechol;Cetyltrimethylammonium Bromide;Cyclic Voltammetry;Glassy Carbon Electrode;Sodium Dodecylsulphate;Thiourea
Issue Date: Jan-2012
Publisher: NISCAIR-CSIR, India
Abstract: Glassy carbon electrode surface has been modified with catechol encapsulated in cetyltrimethylammonium bromide (CTAB) or sodium dodecylsulphate (SDS) surfactant film. The modified electrodes show quasi reversible cyclic voltammograms in tris buffer at pH 7.0 with redox potential values + 0.250 V and + 0.185 V respectively, using Ag-AgCl (3M NaCl) as reference. Addition of thiourea into the electrolytic medium increases the cathodic and anodic currents of the modified electrodes. Anodic current of CTAB film modified electrode is increased by 18 times while cathodic current increased by 1.8 times. However, SDS film modified electrode shows an increase in anodic current by 5.5 times and that in cathodic current by 8.0 times at 3×10-7 M concentration of thiourea compared to that at zero thiourea concentration in electrolytic medium.
Page(s): 52-55
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.19(1) [January 2012]

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