An optical sensor for CO2 using thymol blue and europium(III) complex composite film

被引：29

作者：

Nakamura, N ^{[1
]}

Amao, Y ^{[1
]}

机构：

[1] Oita Univ, Dept Appl Chem, Oita 8701192, Japan

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2003年 / 92卷 / 1-2期

关键词：

optical CO2 sensor; pH indicator; europium(III) complex; colorimetric change;

D O I：

10.1016/S0925-4005(03)00098-4

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new optical CO2 sensor based on the overlay of the CO2 induced absorbance change of pH indicator dye thymol blue with the luminescence of europium(III) complex, tris(thenoyltrifluoroacetonato) europium(III) dihydrate complex [(Eu(tta)(3))] was developed. The observed luminescence intensity from [(Eu(tta)(3))] at 613 nm increased with the increasing CO2 concentration. The response times of the sensing film were 4.0 s for. switching from nitrogen to CO2, and 36 s for switching from CO2 to nitrogen, respectively. The signal changes were fully reversible and hysterisis was not observed during the measurements. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：98 / 101

页数：4

共 15 条

[1] Optical pH, oxygen and carbon dioxide monitoring using a microdialysis approach [J].