SENSITIVE IN SITU TRACE GAS DETECTION BY PHOTOTHERMAL DEFLECTION SPECTROSCOPY
- Fournier, D.
- Boccara, A.C.
- Amer, Nabil M.
- Gerlach, Robert
Publication date
March 1980
DOI Publisher
Lawrence Berkeley National Laboratory ISSN
0003-6951 Citation count (estimate)
85Abstract
We present a sensitive (5 ppb ethylene, 10{sup -7} cm{sup −1) and simple photothermal scheme for the detection of trace gases and measuring weak absorptions in gas phase samples. We also demonstrate the feasibility of this scheme for performing in situ measurements in the absence of sample cells or containers, thus eliminating the drawbacks of sampling and sampling techniques. Factors limiting our detectivity are discussed, and a comparison to the thermal lens effect is made
Add to ORKG