Sensing of gaseous HF at low part-per-trillion levels using a tunable 2.5-μm diode laser spectrometer operating at ambient pressure

被引：8

作者：

Craig, Ian M. ^{[1
]}

Cannon, Bret D. ^{[1
]}

Taubman, Matthew S. ^{[1
]}

Bernacki, Bruce E. ^{[1
]}

Stahl, Robert D. ^{[1
]}

Schiffern, John T. ^{[1
]}

Myers, Tanya L. ^{[1
]}

Phillips, Mark C. ^{[1
]}

机构：

[1] Pacific NW Natl Lab, Richland, WA 99352 USA

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2015年 / 120卷 / 03期

关键词：

HYDROGEN-FLUORIDE; FUNDAMENTAL BANDS; STRATOSPHERIC HCL; WATER-VAPOR; GAS; SPECTROSCOPY; SENSITIVITY; VALIDATION; DATABASE; SHIFTS;

D O I：

10.1007/s00340-015-6159-0

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a sensor based on tunable diode laser absorption spectroscopy for the detection of hydrogen fluoride (HF) gas at ambient pressure. Absorption from the HF R(1) ro-vibrational peak at nu I integral = 4038.962 cm(-1) (2.476 A mu m) in the fundamental (Delta nu = 1) band is measured. A quantitative spectral fit based on HITRAN data is used to account for overlapping spectral peaks of HF and water vapor, with an rms residual noise of 5 x 10(-4) absorbance units. The sensor is optimized for the detection of transient variations in HF concentration. We measure noise-equivalent concentrations for HF of 38 parts-per-trillion by volume (ppt) for 1-s integration times and 2.3 ppt for 10-min integration times.

引用

页码：505 / 515

页数：11

共 59 条

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