Sensors 2014, 14(8), 14399-14410; doi:10.3390/s140814399
Article

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

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Received: 14 May 2014; in revised form: 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)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: 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.
Keywords: greenhouse gas; nitrous oxide; photoacoustic spectroscopy; gas chromatography
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MDPI and ACS Style

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.

AMA Style

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(8):14399-14410.

Chicago/Turabian Style

Kang, Soyoung; Kim, Seoungjin; Kang, Seongmin; Lee, Jeongwoo; Cho, Chang-Sang; Sa, Jea-Hwan; Jeon, Eui-Chan. 2014. "A Study on N2O Measurement Characteristics Using Photoacoustic Spectroscopy (PAS)." Sensors 14, no. 8: 14399-14410.


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