8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-519-C7-522
The analysis of error in trace gas concentration measurements by intermodulated photoacoustic stark spectroscopy (IMPASS)T. Groot1, D. Bicanic1, M. van Montfort2, P. Torfs3, R. Braun1 and K. van Asselt1
1 Laser Photoacoustic Laboratory, Department of Agricultural Engineering and Physics, Agricultural University, Bomenweg 4, 6703 HD Wageningen, The Netherlands
2 Department of Mathematics, Dreijenlaan 4, Agricultural University, 6703 HA Wageningen, The Netherlands
3 Department of Water Resources, Agricultural University, de Nieuwlanden, Nieuwe Kanaal 11, 6709 PA Wageningen, The Netherlands
Data collected in an actual IMPASS experiment with a static gaseous mixture (methyl fluoride/ethylene/nitrogen) of preselected concentrations were analyzed with respect to uni(bi)modality, symmetry, skeweness and kurtosis. Bimodal probability distribution function is significantly different from Gaussian suggesting the presence of "mixed" data in the measurements ; the potential cause for this phenomenon is discussed.
© EDP Sciences 1994