Amperometric sensor for nitrite based on copper tetrasulphonated phthalocyanine immobilized with poly-caps">l-lysine film

详细信息	查看全文 | 推荐本文 |

• 作者：Aline L. Sousa ; Wilney J.R. Santos ; Rita C.S. Luz ; Flavio S. Damos ; Lauro T. Kubota ; Auro A. Tanaka ; S&#xf4 ; nia M.C.N. Tanaka
• 关键词：Nitrite ; Copper tetrasulfophthalocyanine ; Poly-class="smCaps">l-lysine ; Amperometric sensor ; Electrocatalytic oxidation
• 刊名：Talanta
• 出版年：2008
• 期刊代码：106_00399140
• 类别：ch
• 出版时间：15 April 2008
• 卷：75
• 期：2
• 页码：333-338
• 文件大小：332 K

摘要

In this work, an amperometric sensor for nitrite detection based on a glassy carbon electrode modified with copper tetrasulphonated phthalocyanine immobilized by polycationic poly-class="smCaps">l-lysine film is presented. The modified electrode showed an excellent catalytic activity toward nitrite oxidation. A linear response range from 0.12 up to 12.20 ;c;mol L⁻¹ was obtained with a sensitivity of 0.83 ;c;A L ;c;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 ;c;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)%.