基于用聚-L-赖氨酸膜固定化的四磺酸铜酞菁的亚硝酸根安培传感器。
Amperometric sensor for nitrite based on copper tetrasulphonated phthalocyanine immobilized with poly-L-lysine film.
作者信息
Sousa Aline L, Santos Wilney J R, Luz Rita C S, Damos Flavio S, Kubota Lauro T, Tanaka Auro A, Tanaka Sônia M C N
机构信息
Center of Sciences and Technology, UFMA, Avenida dos Portugueses s/n, 65085-580 São Luís, MA, Brazil.
出版信息
Talanta. 2008 Apr 15;75(2):333-8. doi: 10.1016/j.talanta.2007.10.016. Epub 2007 Oct 16.
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. A linear response range from 0.12 up to 12.20 micromol L(-1) was obtained with a sensitivity of 0.83 microA L micromol(-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 micromol 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)%.
在本工作中，提出了一种基于修饰有通过聚阳离子聚-L-赖氨酸膜固定的四磺酸基铜酞菁的玻碳电极的亚硝酸根检测电流型传感器。修饰电极对亚硝酸根氧化表现出优异的催化活性。获得了从0.12到12.20 μmol L⁻¹的线性响应范围，灵敏度为0.83 μA L μmol⁻¹。亚硝酸根的检测限为36 nmol L⁻¹。所提出传感器的重复性，以相对标准偏差衡量，对于10 μmol L⁻¹亚硝酸根溶液的10次测量为1%。最后，将所开发的传感器应用于水样中亚硝酸根的测定，结果与比较方法一致。样品的平均回收率为101（±4）%。
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