Solid-state ammonia sensor based on Berthelot's reaction

被引：50
作者：
Lau, KT
Edwards, S
Diamond, D
机构：
[1] Dublin City Univ, Sch Chem Sci, Natl Ctr Sensor Res, Dublin, Ireland
[2] Univ Luton, Luton LU1 5DU, Beds, England
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2004年 / 98卷 / 01期
关键词：
ammonia detection; Berthelot's reaction; optical sensor; colorimetric method; solid-state ammonia sensor; disposable sensor; water monitoring;
D O I：
10.1016/j.snb.2003.08.004
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A non-reversible solid-state ammonia sensor based on formation of indophenol blue has been developed. A new optimised reaction conditions found for Berthelot's reaction allow the sensor to respond to dissolved ammonia in ambient conditions at a much faster reaction rate than previously known. This solid-state colorimetric sensor reaches maximum colour intensity in similar to3 min at room temperature (similar to20 degreesC) and responds linearly to ammonia between 1 and 10ppm. A semi-automatic imaging system that consists of a black and white digital camera illuminated by red, green and blue LEDs was developed to measure the sensor responses. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：12 / 17
页数：6
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