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Sensors 2014, 14(8), 14399-14410;

A Study on N2O Measurement Characteristics Using Photoacoustic Spectroscopy (PAS)

Cooperate Course for Climate Change, Sejong University, Seoul 143-747, Korea
Environment & Energy Institute, Sejong University, Seoul 143-747, Korea
Department of Environment & Energy, Sejong University, Seoul 143-747, Korea
Author to whom correspondence should be addressed.
Received: 14 May 2014 / Revised: 18 July 2014 / Accepted: 23 July 2014 / Published: 7 August 2014
(This article belongs to the Special Issue Modern Technologies for Sensing Pollution in Air, Water, and Soil)
Full-Text   |   PDF [375 KB, uploaded 7 August 2014]


N2O, which is emitted mainly from nitrogen decomposition via bacteria, livestock manure, agricultural fertilizer use, fossil fuel combustion and waste incineration, is classified as a substance that causes significant destruction of the ozone layer. The N2O measurement methods for these emission sources may be divided into chromatography, optical, and electrical current measurements. Chromatography has been widely utilized for analyzing N2O. However, up until now, few studies have been conducted on N2O using photoacoustic spectroscopy. Therefore, this study aimed to evaluate performance of photoacoustic spectroscopy in this regard based on laboratory and field test results. The repeatability of photoacoustic spectroscopy was measured at 1.12%, which is lower than the repeatability of 3.0% suggested by the ISO 1564 standard, so, it has shown an excellent repeatability. The detection limit was determined to be 0.025 ppm, and the response time was confirmed to be 3 min and 26 s. The results of comparison between these measurements and GC show that the latter has superior accuracy, but mobility and convenience are superior for PAS. On the contrary, GC has a continuous measurement limitation, but PAS makes it possible to conduct continuous measurements. Therefore, PAS can be extremely useful to confirm the characteristics of N2O emissions and to quantify their amount. View Full-Text
Keywords: greenhouse gas; nitrous oxide; photoacoustic spectroscopy; gas chromatography greenhouse gas; nitrous oxide; photoacoustic spectroscopy; gas chromatography
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Kang, S.; Kim, S.; Kang, S.; Lee, J.; Cho, C.-S.; Sa, J.-H.; Jeon, E.-C. A Study on N2O Measurement Characteristics Using Photoacoustic Spectroscopy (PAS). Sensors 2014, 14, 14399-14410.

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