Ultrasensitive gaseous NH3 sensor based on ionic liquid-mediated signal-on electrochemiluminescence

被引：22

作者：

Chen, Lichan

Huang, Danjun

Zhang, Yuanjin

Dong, Tongqing

Zhou, Chen

Ren, Shuyan

Chi, Yuwu ^{[1
]}

Chen, Guonan

机构：

[1] Fuzhou Univ, MOE Key Lab Anal & Detect Technol Food Safety, Fujian Prov Key Lab Anal & Detect Technol Food Sa, Fuzhou 350108, Fujian, Peoples R China

来源：

ANALYST | 2012年 / 137卷 / 15期

基金：

中国国家自然科学基金;

关键词：

CAPILLARY-ELECTROPHORESIS; ELECTROGENERATED CHEMILUMINESCENCE; AMMONIA; OXIDATION; TRIS(2,2'-BIPYRIDYL)RUTHENIUM(II); MECHANISM; URINE; WATER; OXIDE;

D O I：

10.1039/c2an35218d

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This work reports that ammonia (NH3) can be used as an efficient co-reactant for tris(2,2'-bipyridine)-ruthenium(II) (Ru(bpy)(3)(2+)) electrochemiluminescence (ECL) in ionic liquids (ILs), on the basis of which a signal-on ECL sensor for directly detecting gaseous NH3 has been developed. The NH3 ECL sensor has a very high sensitivity, with a detection limit of 10 ppt NH3 (at signal-to-noise ratio of 3) without any preconcentration. The high sensitivity is mainly due to the zero ECL background of Ru(bpy)(3)(2+) in the ILs, strong co-reactant ECL activity of NH3, and high solubility of NH3 in imidazolium-based ILs. Additionally, the ECL sensor shows an excellent selectivity against common interfering gases and a wide linear response range from 10 ppt to 10 ppm.

引用

页码：3514 / 3519

页数：6

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