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Type: Artigo de periódico
Title: Amperometric sensor for nitrite based on copper tetrasulphonated phthalocyanine immobilized with poly-L-lysine film
Author: Sousa, AL
Santos, WJR
Luz, RCS
Damos, FS
Kubota, LT
Tanaka, AA
Tanaka, SMCN
Abstract: In this work, an amperometric sensor for nitrite detection based on a glassy carbon electrode modified with copper tetrasulphonated phthalocyanine immobilized by polycationic poly-L-lysine film is presented. The modified electrode showed an excellent catalytic activity toward nitrite oxidation. linear response range from 0.12 up to 12.20 mu mol L-1 was obtained with a sensitivity of 0.83 mu A L mu mol(-1). The detection limit for nitrite was 36 nmol L-1. The repeatability of the proposed sensor, evaluated in terms of relative standard deviation, was 1 % for 10 measurements of 10 mu mol L-1 nitrite solution. Finally, the developed sensor was applied for nitrite determination in water samples and the results were in agreement to the comparative method. The average recovery for the samples was 101 (+/- 4)%. (c) 2008 Published by Elsevier B.V.
Subject: nitrite
copper tetrasulfophthalocyanine
amperometric sensor
electrocatalytic oxidation
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.talanta.2007.10.016
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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