Quartz-Enhanced Photoacoustic Spectroscopy of Methane Isotopologues

被引：1

作者：

Giglio, Marilena ^{[1
]}

Sampaolo, Angelo ^{[1
]}

Patimisco, Pietro ^{[1
]}

Pinto, Davide ^{[1
]}

Menduni, Giansergio ^{[1
]}

Elefante, Arianna ^{[1
]}

Dello Russo, Stefano ^{[1
]}

Sgobba, Fabrizio ^{[1
]}

Zifarelli, Andrea ^{[1
]}

Tittel, Frank K. ^{[2
]}

Spagnolo, Vincenzo ^{[1
]}

机构：

[1] Univ & Politecn Bari, Dipartimento Interateneo Fis, PolySense Lab, Via Amendola 173, Bari, Italy

[2] Rice Univ, Dept Elect & Comp Engn, 6100 Main St, Houston, TX 77005 USA

来源：

PHOTONIC INSTRUMENTATION ENGINEERING VIII | 2021年 / 11693卷

关键词：

quartz-enhanced photoacoustic spectroscopy; methane; methane isotopologues; TUNING FORKS; SENSOR;

D O I：

10.1117/12.2578149

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We report on the detection of the isotopologues (CH4)-C-12 and (CH4)-C-13 by employing a quartz-enhanced photoacoustic spectroscopy (QEPAS)-based sensor. By properly selecting the exciting light source and the working conditions, two absorption lines, having a negligible cross-section ratio temperature coefficient of -6.7 parts per thousand/degrees C and a cross section ratio of similar to 0.06 for a natural abundance of each isotope, can be targeted. The QEPAS signal of the two isotopologues was acquired for mixtures in nitrogen of methane in natural abundance in a wide range of concentrations (0.02%-20%) showing a non-linear trend with high concentrations and a constant ratio comparable with the cross-section.

引用

页数：6

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