학술논문
SO2 Monitoring With Solid State-Based UV Spectroscopy Compact Apparatus
Document Type
Periodical
Author
Source
IEEE Sensors Journal IEEE Sensors J. Sensors Journal, IEEE. 19(16):7089-7094 Aug, 2019
Subject
Language
ISSN
1530-437X
1558-1748
2379-9153
1558-1748
2379-9153
Abstract
We propose a solid state-based spectroscopy compact apparatus for monitoring environmental SO 2 , particularly suitable, for example, for volcanic applications. A prototype system, with a 170-mm long optical path, was assembled and tested using a commercial LED operating at 285 nm and a large area silicon carbide. The laboratory tests were carried out using calibrated quartz cuvettes containing SO 2 at fixed concentrations and standard SO 2 gas with 20% of O 2 and complemented with N 2 dry gas to fill the optical system chamber. Optical signal attenuations in the chemically interactive chamber follow the Beer-Lambert-Bouguer law in all the performed tests and a 0.16 ppm/pA nominal chemical resolution and ± 0.8 ppm concentration error were obtained from the experimental data for the current prototype.