Determination of sulfur dioxide in vitriol plant wastewater by using a polyNiMe4TAA electrochemically modified Pt microelectrode |
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Authors: | Li H Tu H Cai Q Xian Y Jin L |
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Institution: | Department of Chemistry, East China Normal University, Shanghai, 200062, China. |
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Abstract: | A Pt microelectrode modified with nickel(II) polytetramethyldibenzob,i]tetraaza14]annulene was prepared by electropolymerization of nickel(II) tetramethyldibenzob,i]tetraaza14]annulene monomers and applied to determine sulfur dioxide in vitriol plant wastewater. For determination of SO2 with this electrochemically modified Pt microelectrode, the linear range was from 9.6 x 10(-6) to 2.4 x 10(-4) mol L-1, the sensitivity was 1.8 x 10(-4) A L mol-1, the detection limit was calculated to be 4.8 x 10(-6) mol L-1 (S/N = 3), the response time was less than 20 s and the relative standard deviation was found to be 2.1% on analyzing 4.8 x 10(-5) mol L-1 SO2 solution repeatedly (n = 7). These results demonstrated good accuracy compared with those obtained by the conventional iodimetric method. |
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