Sensitive in situ trace-gas detection by photothermal deflection spectroscopy

We present a sensitive (5ppb for ethylene, 10-7 cm-1) and simple photothermal scheme for the detection of trace gases and measuring weak absorption in gas-phase samples. We also demonstrate the feasibility of this scheme for performing i n s i t u measurements in the absence of sample cells or conta...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 1980-09, Vol.37 (6)
Main Authors: Fournier, D., Boccara, A. C., Amer, Nabil M., Gerlach, Robert
Format: Article
Language:eng ; jpn
Subjects:
ATOMIC AND MOLECULAR PHYSICS
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
RADIATION ABSORPTION ANALYSIS, GASES, SPECTROSCOPY, SENSITIVITY, ETHYLENE, DATA, COMPARATIVE EVALUATIONS, ACCURACY
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present a sensitive (5ppb for ethylene, 10-7 cm-1) and simple photothermal scheme for the detection of trace gases and measuring weak absorption in gas-phase samples. We also demonstrate the feasibility of this scheme for performing i n s i t u measurements in the absence of sample cells or containers, thus eliminating the drawbacks of sampling and sampling techniques. Finally, factors limiting our detectivity are discussed, and a comparison to the thermal lens effect is made.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.91970