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Article

Measurement of Atmospheric Dimethyl Sulfide with a Distributed Feedback Interband Cascade Laser

State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China
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Sensors 2018, 18(10), 3216; https://doi.org/10.3390/s18103216
Received: 14 August 2018 / Revised: 14 September 2018 / Accepted: 18 September 2018 / Published: 24 September 2018
(This article belongs to the Special Issue VOC Sensors Applicable to IoT and Healthcare)
This paper presents a mid-infrared dimethyl sulfide (CH3SCH3, DMS) sensor based on tunable laser absorption spectroscopy with a distributed feedback interband cascade laser to measure DMS in the atmosphere. Different from previous work, in which only DMS was tested and under pure nitrogen conditions, we measured DMS mixed by common air to establish the actual atmospheric measurement environment. Moreover, we used tunable laser absorption spectroscopy with spectral fitting to enable multi-species (i.e., DMS, CH4, and H2O) measurement simultaneously. Meanwhile, we used empirical mode decomposition and greatly reduced the interference of optical fringes and noise. The sensor performances were evaluated with atmospheric mixture in laboratory conditions. The sensor’s measurement uncertainties of DMS, CH4, and H2O were as low as 80 ppb, 20 ppb, and 0.01% with an integration time 1 s, respectively. The sensor possessed a very low detection limit of 9.6 ppb with an integration time of 164 s for DMS, corresponding to an absorbance of 7.4 × 10−6, which showed a good anti-interference ability and stable performance after optical interference removal. We demonstrated that the sensor can be used for DMS measurement, as well as multi-species atmospheric measurements of DMS, H2O, and CH4 simultaneously. View Full-Text
Keywords: chemical sensor; mid-infrared dimethyl sulfide sensor; tunable laser absorption spectroscopy; distributed feedback interband cascade laser; spectral fitting; multi-species measurement; simultaneous measurement; empirical mode decomposition chemical sensor; mid-infrared dimethyl sulfide sensor; tunable laser absorption spectroscopy; distributed feedback interband cascade laser; spectral fitting; multi-species measurement; simultaneous measurement; empirical mode decomposition
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MDPI and ACS Style

Wang, S.; Du, Z.; Yuan, L.; Ma, Y.; Wang, X.; Han, R.; Meng, S. Measurement of Atmospheric Dimethyl Sulfide with a Distributed Feedback Interband Cascade Laser. Sensors 2018, 18, 3216. https://doi.org/10.3390/s18103216

AMA Style

Wang S, Du Z, Yuan L, Ma Y, Wang X, Han R, Meng S. Measurement of Atmospheric Dimethyl Sulfide with a Distributed Feedback Interband Cascade Laser. Sensors. 2018; 18(10):3216. https://doi.org/10.3390/s18103216

Chicago/Turabian Style

Wang, Shuanke, Zhenhui Du, Liming Yuan, Yiwen Ma, Xiaoyu Wang, Ruiyan Han, and Shuo Meng. 2018. "Measurement of Atmospheric Dimethyl Sulfide with a Distributed Feedback Interband Cascade Laser" Sensors 18, no. 10: 3216. https://doi.org/10.3390/s18103216

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