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|Type:||Artigo de periódico|
|Title:||Preparation and Properties of the Hybrid Material n-Propyl(3-methylpyridinium)silsesquioxane Chloride. Application in Electrochemical Determination of Nitrite|
|Abstract:||The synthesis and properties of the ion exchange polymer 3-n-propyl(3-methylpyridinium)silsequioxane chloride (SiPy(+)Cl(-)) are described. Based on the Langmuir model, the equilibrium constant at the solid-solution interface for the reaction. SiPy(+)Cl(-) + NO(2)(-) reversible arrow SiPy(+)NO(2)(-), was calculated for nitrite adsorption. The value found, beta = 8.7 x 10(3) L mol(-1), indicates good affinity of the anion for the solid phase. A carbon paste electrode of the material was tested for NO(2)(-) oxidation and a linear response. in the concentration range between 6.3 and 143.6 mu mol L(-1), was obtained by amperometry. The analytical applicability of the proposed system was ascertained by the satisfactory results attained in its application to monitoring of nitrite in natural waters.|
|Editor:||Wiley-v C H Verlag Gmbh|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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