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Paper Information

Journal:   JOURNAL OF PHYSICAL AND THEORETICAL CHEMISTRY   SUMMER 2017 , Volume 14 , Number 2; Page(s) 133 To 142.

Design and Evaluation of a Mercury (II) Optode Based on Immobilization of 5, 6 Di methyl-1-(4 methyl benzyl)-2-para tolyl-1H-benzimidazole (DMBPTBI) on a Triacetylcellulose Membrane and Determination in Various Samples

Author(s):  Mosadeghei Fard A., Vatankhah G.H.*
* Department of Chemical Engineering, Bushehr Azad University, bushehr, Iran
The characterization of an optical sensor membrane is described for the determination of Hg2+ ions based on the immobilization of 5, 6 Di methyl-1-( 4 methyl benzyl)-2-para tolyl-1H-benzimidazole (DMBPTBI) on a triacetylcellulose membrane. The membrane responds to mercury ions by changing color reversibly from orange to red in universal buffer solution at pH 2. Under optimum conditions, the proposed membrane displayed a linear range of 0. 1-12 μ g mL-1 with a limit of detection of, 0. 02 μ g mL-1 at a wavelength of 558 nm. The response time of the optode was about 8-10 min, depending on the concentration of mercury (II) ions. The coefficients of variation (CV) of the sensor response for, 1. 0 μ g mL-1 of Hg(II) was, 1. 8% and the CV between seven membranes was 2. 3%. The sensor can readily be regenerated with the ethylene diamine solution. The optode is fully reversible and the selectivity of optode to Hg2+ ions in universal buffer is relatively good as interferences. The proposed optode was applied successfully for the determination of mercury (II) in various samples.
Keyword(s): Optode;Hg2+ions;55,6 Di methyl,1,(4 methyl benzyl),2,para tolyl,1H,benzimidazole (DMBPTBI);Ethylene diamine;Triacetylcellulose
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