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Updated: Jun 9, 2026
06:27
Fast and Accurate Exhaled Breath Ammonia Measurement
Published on: June 11, 2014
Inexpensive near-infrared diode-laser-based detection system for ammonia
Applied Optics
|September 8, 2010
Summary
A new, affordable, and portable system for monitoring ammonia gas was developed using near-infrared diode lasers. This system can detect ammonia concentrations as low as 2 parts per million, offering rapid and sensitive environmental analysis.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Optical Engineering
Background:
- Accurate ammonia monitoring is crucial for environmental protection and industrial safety.
- Existing ammonia detection methods can be expensive, bulky, or lack portability.
Purpose of the Study:
- To develop an inexpensive and portable ammonia monitoring system.
- To demonstrate the system's capability for sensitive ammonia detection.
Main Methods:
- Utilized near-infrared GaAs-type diode lasers for ammonia absorption spectroscopy.
- Designed a portable system with a 1-meter absorption path length.
- Optimized for a 1-second response time.
Main Results:
- Achieved a minimum detectable ammonia concentration of 2 parts in 10^6 (ppm).
- System operates effectively at 100 Torr pressure.
- Demonstrated portability and cost-effectiveness.
Conclusions:
- The developed diode laser system offers a viable solution for portable and inexpensive ammonia monitoring.
- The system's sensitivity and response time meet requirements for various environmental and industrial applications.
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