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Chemiluminescence-based Assays for Detection of Nitric Oxide and its Derivatives from Autoxidation and Nitrosated Compounds
Published on: February 16, 2022
Nitric oxide measurements in a flame by laser fluorescence
Applied Optics
|March 12, 2010
Summary
Laser-induced fluorescence successfully detected nitric oxide (NO) in a methane flame. This technique achieved adequate sensitivity for measuring naturally occurring NO levels, with potential for higher sensitivity using more intense lasers.
Area of Science:
- Chemical Physics
- Combustion Science
- Spectroscopy
Background:
- Nitric oxide (NO) plays a crucial role in combustion processes and air quality.
- Accurate measurement of NO concentrations in flames is essential for understanding combustion chemistry and emissions.
- Traditional methods for NO detection can be intrusive or lack sufficient sensitivity.
Purpose of the Study:
- To demonstrate the application of laser-induced fluorescence (LIF) for detecting nitric oxide (NO) in a flame.
- To assess the sensitivity of LIF for measuring naturally occurring NO levels.
- To explore the potential for improving NO detection sensitivity in combustion environments.
Main Methods:
- Utilized laser-induced fluorescence (LIF) spectroscopy.
- Employed a frequency-doubled tunable dye laser to excite the UV gamma-bands of nitric oxide.
- Performed measurements in a atmospheric pressure CH(4)-O(2)-N(2) flame.
Main Results:
- Successfully detected nitric oxide (NO) in the methane-oxygen-nitrogen flame.
- Achieved adequate sensitivity to measure naturally occurring NO concentrations in the 20-30 ppm range.
- Demonstrated the feasibility of LIF for in-situ NO quantification in combustion.
Conclusions:
- Laser-induced fluorescence is a viable and sensitive technique for NO detection in flames.
- The current setup provides sufficient sensitivity for typical NO levels in combustion.
- Higher output lasers can further enhance the sensitivity of NO detection using LIF.
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