Determination of S(IV) Oxoanions at Poly[Ru(5-NO2-Phen)(2)Cl] Tetrapyridylporphyrin Glassy Carbon Modified Electrode

作者：Dreyse Paulina; Quezada Diego; Honores Jessica; Jesus Aguirre Maria; Mendoza Leonora; Matsuhiro Betty; Villagra Diego; Isaacs Mauricio^*

来源：Electroanalysis, 2012, 24(8): 1709-1718.

DOI：10.1002/elan.201200038

• Sulfite
• Tetraruthenated porphyrins
• Conducting polymers
• Electrocatalysis
• Modified electrodes

Glassy carbon electrodes modified with conducting polymers of Ni(II), Zn(II) and metal free tetraruthenated porphyrin were evaluated for reduction and oxidation processes of S(IV) oxoanions in Na2SO3/water-ethanol at pH 1.0 and 3.5, showing electrocatalytic activity. A Ni(II) film was able to reduce the S(IV) oxoanions selectively in presence of high concentration of gallic acid. The Ni(II) film was also used as an amperometric sensor toward S(IV) oxoanions reduction in white wine samples showing a detection and quantification limit of 1.40 mgL(-1) and 4.68 mgL(-1), respectively. These results are promising for the electrochemical determination of S(IV) using conducting polymers from these macrocycles.

• 出版日期2012-8