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Method for Measuring NOx Concentrations in Small Quantities of Sample Gas
Technical Paper
1999-01-3478
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This study attempted to measure the concentration of NOx in a small gas sample, with a chromatograph equipped with a flame ionization detector (FID), by reacting NOx as an organic gas with alcohol and converting it into esters of nitrous acid having organic carbon atoms.
It was found that since the FID is highly sensitive to hydrocarbons the measurements were difficult with high concentrations of hydrocarbon components with low boiling points at the elution position of the esters of nitrous acid. To resolve this a gas chromatograph equipped with an electron capture detector (ECD), which is selectively sensitive to esters of nitrous acid and not sensitive to hydrocarbon components with low boiling points was used.
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Noto, T., Murayama, T., Tosaka, S., and Fujiwara, Y., "Method for Measuring NOx Concentrations in Small Quantities of Sample Gas," SAE Technical Paper 1999-01-3478, 1999, https://doi.org/10.4271/1999-01-3478.Also In
References
- Maeda, Y. et al. “Determination of Trace Amounts of Alcohols in Ambient Air and Exhaust Gas from Vehicles Using Formation of Alkyl Nitrite” J. Japan Soc. Air Pollut 23 5 1988
- Fujiwara, Y. Tosaka, S. Ito, T. “A Method of NOx Analysis Using Small Sample Gas” Proceedings of the 1994 Annual Meeting of JSME 1994