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Vol. 149, No. 2, February 2013, pp. 89-93




Electrochemical Sensors for Detecting Mn (II) in Blood Medium

*1 Muhammed Mizher Radhi, 2 Nawfal Khalid Al-Damlooji, 3 Baquir Kareem Abed, 3 Dawood Salman Dawood, and 4 Tan Wee Tee

1 Department of Radiological Techniques, College of Health and Medical Technology, Baghdad, Iraq

2 Department of physiotherapy Techniques, College of Health and Medical Technology, Baghdad, Iraq

3 Department of medicine Lab.Technology, College of Health and Medical Technology, Baghdad, Iraq

4Department of Chemistry, Faculty of Science, University Putra Malaysia,

43400 Serdang, Selangor, Malaysia

* Tel.: +964-7901302475

* E-mail: mmradhi@yahoo.com


Received: 2013   /Accepted: 14 February 2013   /Published: 28 February 2013

Digital Sensors and Sensor Sysstems


Abstract: The fabrication of CNT and C60 films using the multilayer MWCNT films on glassy carbon electrode (GCE) in electroanalysis studies esp. cyclic voltammetry. The doping of the Li+ ion onto the modified GCE with carbon nanotubes CNT and C60 was carried out to 10 potential cycling in the presence of 0.1M LiOH. The modified CNT/Li+/GCE and C60/Li+/GCE were used as working electrodes and applied for the detection of Mn(II) ion in blood medium using cyclic voltammetry (CV) technique. The C60/Li+/GC electrode response was obtained for the oxidation peak of (0.05-0.2 mM) of Mn(II) ion in blood medium as a supporting electrolyte, and for CNT/Li+/GC electrode response was obtained for the oxidation and reduction current peaks at (0.02-0.1 mM) of Mn(II) ion in blood medium as a supporting electrolyte. A well defined oxidation peak appeared at +1.0 V vs Ag/AgCl with a current enhancement and peak potential shift towards higher potential due to nano materials (CNT and C60) and presence of Lithium doped comparison with CNT/GCE and C60/GCE. Besides that, the presence of CNT with Lithium doped in blood media caused to appearing a reduction peak of Mn(II) at +0.6 V vs Ag/AgCl. So it can be said that these modified electrodes could be used as good sensors in CV for the detection of traces of manganese in blood medium. A linear relationship (R2=0.981, Y=839.1X+14.42) was observed for the plot of current (μA) versus concentration range of 210-5- 110-4 M of manganese in blood media using CNT and Lithium doped modified GCE.


Keywords: Sensors, Blood medium, Mn(II), CNT/Li+/GCE, C60/Li+/GCE


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