OPTICAL HUMIDITY AND AMMONIA GAS SENSORS USING REICHARDTS DYE-POLYMER COMPOSITES

被引：32

作者：

SADAOKA, Y

SAKAI, Y

MURATA, Y

机构：

[1] Department of Applied Chemistry, Faculty of Engineering, Ehime University, Matsuyama

来源：

TALANTA | 1992年 / 39卷 / 12期

关键词：

D O I：

10.1016/0039-9140(92)80202-O

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Optical intensity reflected at 750 nm by Reichardt's betain dye-polymer (PMMA or PEO) composite increased with an increase in humidity and was not affected by ammonia vapor. For the composites treated with hydrochloric acid, the intensity at around 590 nm decreased with an increase in ammonia concentration, and the sensitivity was enhanced by the presence of water vapor. The treatment with hydrochloric acid induced the formation of phenolic group, O--H+ and N+-Cl- in the dye. The sorption of NH3 decreases the ionic interactions.

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页码：1675 / 1679

页数：5

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