Breath methane detection based on all-optical photoacoustic spectrometer

被引：43
|
作者：
Mao, Xuefeng [1 ]
Zheng, Peichao [1 ]
Wang, Xiaofa [1 ]
Yuan, Suzhen [1 ]
机构：
[1] Chongqing Inst Posts & Telecommun, 2 Chongwen Rd, Chongqing 400065, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2017年 / 239卷
基金：
中国国家自然科学基金;
关键词：
Photoacoustic spectroscopy; Breath methane detection; Fiber acoustic sensor; DFB lasers; DIODE-LASER; ABSORPTION-SPECTROSCOPY; SENSOR;
D O I：
10.1016/j.snb.2016.09.132
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A novel approach for breath methane monitoring is presented, which employs an all-optical photoacoustic spectrometer based on a distributed feedback (DFB) laser diode and a fiber acoustic sensor. To avoid the interference of high concentration of CO2 and H2O at atmospheric pressure, the 1650.96 nm absorption line for CH4 is selected. The minimum detection limit of 64 ppb (signal-to-noise ratio =3) in simulated breath samples (4% CO2 and 6% H2O (100% relative humidity at 37 degrees C)) is achieved. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：1257 / 1260
页数：4
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