Solid-state ammonia sensor based on Berthelot's reaction

King Tong Lau; Steve Edwards; Dermot Diamond

doi:10.1016/j.snb.2003.08.004

Solid-state ammonia sensor based on Berthelot's reaction

King Tong Lau^*, Steve Edwards, Dermot Diamond

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

55 Citations (Scopus)

Abstract

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 ∼3 min at room temperature (∼20 °C) and responds linearly to ammonia between 1 and 10 ppm. 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.

Original language	English
Pages (from-to)	12-17
Number of pages	6
Journal	Sensors and Actuators, B: Chemical
Volume	98
Issue number	1
DOIs	https://doi.org/10.1016/j.snb.2003.08.004
Publication status	Published - 1 Mar 2004
Externally published	Yes

Keywords

Ammonia detection
Berthelot's reaction
Colorimetric method
Disposable sensor
Optical sensor
Solid-state ammonia sensor
Water monitoring

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10.1016/j.snb.2003.08.004

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abstract = "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 ∼3 min at room temperature (∼20 °C) and responds linearly to ammonia between 1 and 10 ppm. 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.",

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AU - Edwards, Steve

AU - Diamond, Dermot

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AB - 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 ∼3 min at room temperature (∼20 °C) and responds linearly to ammonia between 1 and 10 ppm. 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.

KW - Ammonia detection

KW - Berthelot's reaction

KW - Colorimetric method

KW - Disposable sensor

KW - Optical sensor

KW - Solid-state ammonia sensor

KW - Water monitoring

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JO - Sensors and Actuators, B: Chemical

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Solid-state ammonia sensor based on Berthelot's reaction

Abstract

Keywords

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