A ppb-level NO2 gas sensor using coloration reactions in porous glass

被引：38

作者：

Tanaka, T ^{[1
]}

Guilleux, A ^{[1
]}

Ohyama, T ^{[1
]}

Maruo, YY ^{[1
]}

Hayashi, T ^{[1
]}

机构：

[1] NTT, Integrated Informat & Energy Syst Labs, Musashino, Tokyo 1800012, Japan

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1999年 / 56卷 / 03期

关键词：

NO2; porous glass; coloration reaction; UV-visible absorption;

D O I：

10.1016/S0925-4005(99)00185-9

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Coloration reactions for NO2 detection were demonstrated to occur in the pores of porous glass. Porous glass chips impregnated with a new combination of coupling reagents (sulfanilamide as a diazotizing reagent and N,N-dimethyl-1-naphthylamine as a coupling reagent) showed large absorbance changes after exposure to NO2 in both artificial and actual environments, indicating their applicability to ppb-level NO2 detection. A simple sensor device, consisting of this doped porous glass, a light-emitting diode as a light source, and a photodiode as a detector, can detect hourly changes in ppb-level NO2 concentrations, which has previously been possible only by using large analytical instruments. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：247 / 253

页数：7

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