Sol-gel based optical sensor for dissolved ammonia

被引：60
|
作者：
Lobnik, A
Wolfbeis, OS
机构：
[1] Univ Maribor, Fac Mech Engn, Maribor 2000, Slovenia
[2] Univ Regensburg, Inst Analyt Chem Chemo & Biosensors, D-93040 Regensburg, Germany
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 1998年 / 51卷 / 1-3期
关键词：
optical sensors; aminofluorescein; ammonia; pH;
D O I：
10.1016/S0925-4005(98)00189-0
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Ormosils were prepared in different ratios of tetramethoxysilane and organically modified sol-gel precursors of type R'Si(OR)(3) and R'Si-2(OR)(2). The pH indicator aminofluorescein was incorporated into various ormosils and the resulting materials were tested for their relative response to pH and dissolved ammonia at constant pH. R'Si-2(OR)(2)-based layers were recognized as the most promising materials because of their high permeability to ammonia, impermeability to ions (protons), long operational lifetime and good photostability. (C) 1998 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：203 / 207
页数：5
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