Development of an in situ analysis system for methane dissolved in seawater based on cavity ringdown spectroscopy

doi:10.1063/5.0004742

CIOMP OpenIR

	Development of an in situ analysis system for methane dissolved in seawater based on cavity ringdown spectroscopy
	F. Yuan,M. Hu,Y. B. He,B. Chen,L. Yao,Z. Y. Xu and R. F. Kan
	2020
发表期刊	Review of Scientific Instruments
ISSN	0034-6748
卷号	91 期号:8 页码:9
摘要	This paper reports the development of a compact in situ real-time concentration analysis system for methane dissolved in seawater by using a continuous-wave cavity ringdown spectroscopy (CRDS) technique. The miniaturized design of the system, including optical resonance cavity and control and data acquisition-analysis electronics, has a cylindrical dimension of 550 mm in length and 100 mm in diameter. Ringdown signal generation, data acquisition and storage, current driver, and temperature controller of the diode laser are all integrated in the miniaturized system circuits, with an electrical power consumption of less than 12 W. Fitting algorithms of the ringdown signal and spectral line are implemented in a digital signal processor, which is the main control chip of the system circuit. The detection sensitivity for methane concentration can reach 0.4 ppbv with an approximate averaging time of 240 s (or 4 min). Comparing the system's measurement of ambient air against a high-quality commercial CRDS instrument has demonstrated a good agreement in results. In addition, as a "proof of concept" for measuring dissolved methane, the developed instrument was tested in an actual underwater environment. The results showed the potential of this miniaturized portable instrument for in situ gas sensing applications.
DOI	10.1063/5.0004742
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收录类别	SCI ; EI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/64442
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	F. Yuan,M. Hu,Y. B. He,B. Chen,L. Yao,Z. Y. Xu and R. F. Kan. Development of an in situ analysis system for methane dissolved in seawater based on cavity ringdown spectroscopy[J]. Review of Scientific Instruments,2020,91(8):9.
APA	F. Yuan,M. Hu,Y. B. He,B. Chen,L. Yao,Z. Y. Xu and R. F. Kan.(2020).Development of an in situ analysis system for methane dissolved in seawater based on cavity ringdown spectroscopy.Review of Scientific Instruments,91(8),9.
MLA	F. Yuan,M. Hu,Y. B. He,B. Chen,L. Yao,Z. Y. Xu and R. F. Kan."Development of an in situ analysis system for methane dissolved in seawater based on cavity ringdown spectroscopy".Review of Scientific Instruments 91.8(2020):9.

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