Coloration reactions between NO2 and organic compounds in porous glass for cumulative gas sensor

被引：34

作者：

Tanaka, T

Ohyama, T

Maruo, YY

Hayashi, T

机构：

[1] NTT Corp, Integrated Informat Lab, Musashino, Tokyo 180, Japan

[2] NTT Corp, Energy Syst Lab, Musashino, Tokyo 180, Japan

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1998年 / 47卷 / 1-3期

关键词：

NO2; cumulative gas sensor; porous glass; coloration reaction; UV-visible absorption;

D O I：

10.1016/S0925-4005(98)00051-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Coloration reactions between nitrogen dioxide (NO2) and organic compounds, such as diazocoupling reactions, were demonstrated to occur in pores by exposing organically impregnated porous glass chips to NO2. An NO2 concentration of under 1 ppm can be estimated from the absorbance changes after the coloration reactions. Good linear relationships were obtained between the absorbance changes and exposure time at 200 ppb, indicating the possibility of environmental-level analysis by accumulation. Application to an actual analysis showed that this method can give the variations in NO, concentrations at the environmental level. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：65 / 69

页数：5

共 9 条

[1] Optical-fibre sensors for blood gases and pH, based on porous glass tips [J].