A TC/WMS-TDLAS mid-infrared detection method for ultra-low concentration carbon isotope methane

Wang, Bin; Tang, Xinde; Gan, Yuanying; Li, Xiaoshan; Lu, Youshui

doi:10.1039/d2ja00142j

Cited by 6 publications

(2 citation statements)

References 26 publications

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“…[ 159 ] TDLAS‐based detector with DFB laser at 3.3 µm and herriot gas cell of 4.8 m has been demonstrated with 0.1 ppm detection limit at 2 s response time. [ 160 ] Meanwhile, DFB laser at 1.65 µm and the optical path length of 3 m fetched the detection limit of 3 ppm. [ 161 ] PAS technique reported the minimum detection limit of methane as 329 ppb with ICL laser source at 3.27 µm.…”

Section: Applications Of Ir Breath Analysis Over Biomarkersmentioning

confidence: 99%

Infrared Non‐Invasive Exhaled Biomarker Sensing: A Review

Ranu,

Rahman

et al. 2023

Advanced Sensor Research

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Exhaled breath analysis is considered an effective tool for diagnosing the patient's metabolic status because of its non‐invasive nature. Gas chromatography‐mass spectrometry (GC‐MS) and other mass spectrometry techniques are widely used for exhaled breath analysis. Nevertheless, the requirement of a handheld device for real‐time analysis and rapid processing time of multiple samples leads to advancing infrared (IR) based breath gas sensing techniques. Herein, the IR gas sensing technologies are discussed with a focus on non‐dispersive infrared (NDIR), photoacoustic (PAS), and tunable diode laser absorption spectroscopy (TDLAS) gas sensing technologies because of their highly selective gas detection among compound gases (mixture of VOCs), as well as their corresponding sensing mechanisms and characteristics, for real‐time monitoring of exhaled biomarkers. Carbon dioxide, acetone, ammonia, nitric oxide, methane, and ethylene are the significant biomarkers elaborated in this work with their respective clinical applications and the significance of non‐invasive real‐time monitoring using IR detectors. Challenges in selectivity and clinical trials leads to focus on this review. Current market analysis, present status of different techniques to detect specific biomarkers and other challenges with their possible solutions discussed in this review aid in developing highly selective IR‐based handheld breath VOC analyzers for early diagnosis and screening.

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Section: Applications Of Ir Breath Analysis Over Biomarkersmentioning

confidence: 99%

Infrared Non‐Invasive Exhaled Biomarker Sensing: A Review

Ranu,

Rahman

et al. 2023

Advanced Sensor Research

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“…However, the near-infrared region mainly covers the overtone and combination ro-vibrational bands of the molecules, which are typically orders of magnitude weaker than the mid-infrared fundamental bands. This makes the mid-infrared region more advantageous when only trace species of interest are present [27][28][29]. On the other hand, while a number of demonstrations have been reported with mid-infrared TDLAS for temperature measurement, the adoption of broadband VIPA spectrometer with OFC is still found to be bounded to the near-infrared [30,31].…”

Section: Introductionmentioning

confidence: 99%

Mid-infrared virtually imaged phased array spectrometer with optical frequency comb: fast thermometry over large dynamic range

Zhu,

Song,

Wang

et al. 2023

Meas. Sci. Technol.

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We demonstrate a broadband mid-infrared frequency comb spectrometer utilizing virtually imaged phased array (VIPA) with the potential of quantitative, fast thermometry over large dynamic range. A modified Boltzmann plot method for attaining quantitative spectral interpretation in the dispersive VIPA system is proposed and realized, despite the broadband spectral overlapping and spatially variant instrumental broadening. The developed method allows accurate interpretation of the comb spectra even without reaching single-comb-tooth resolution, and can be readily extended to other measurements with overlapped spectra. The method is validated with measurements of the ν3 band of methane, and a single-shot temperature accuracy of within 10 K is experimentally demonstrated over the range of 300 to 600 K at a rate of 200 Hz. The present method takes full benefit of the unique advantages of the high-resolution, broadband VIPA-based frequency comb spectroscopy and has the potential to offer fast and precise thermometry. As far as we know, this is the first study to use a mid-infrared virtually imaged phased array for temperature measurement with frequency comb spectroscopy.

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Methane concentration inversion under multiple conditions using feature fusion residual network

Kan,

Liu,

Liang

et al. 2024

Optics Communications

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A TC/WMS-TDLAS mid-infrared detection method for ultra-low concentration carbon isotope methane

Abstract: There is a great demand for online high-precision monitoring of carbon isotope methane in the fields of atmospheric monitoring, geological exploration, and oil, natural gas extraction, etc. However, the current...

Cited by 6 publications

References 26 publications

Infrared Non‐Invasive Exhaled Biomarker Sensing: A Review

Infrared Non‐Invasive Exhaled Biomarker Sensing: A Review

Mid-infrared virtually imaged phased array spectrometer with optical frequency comb: fast thermometry over large dynamic range

Methane concentration inversion under multiple conditions using feature fusion residual network

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