| Issue |
J. Phys. IV France
Volume 04, Number C7, Juillet 1994
8th International Topical Meeting on Photoacoustic and Photothermal Phenomena8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique |
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|---|---|---|
| Page(s) | C7-479 - C7-482 | |
| DOI | https://doi.org/10.1051/jp4:19947112 | |
8th International Topical Meeting on Photoacoustic and Photothermal Phenomena
8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-479-C7-482
DOI: 10.1051/jp4:19947112
1 Jozef Stefan Institute, Department of Environmental and Analytical Chemistry, Jamova 39, 61111 Ljubljana, Slovenia
2 Laser Photoacoustic Laboratory, Department of Agricultural Engineering and Physics, Agricultural University, Bomenweg 4, 6703 HD Wageningen, The Netherlands
3 Department of Human Nutrition, Biotechnion, Agricultural University, Bomenweg 2, 6703 HD Wageningen, The Netherlands
© EDP Sciences 1994
8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-479-C7-482
DOI: 10.1051/jp4:19947112
Dual beam infrared thermal lens spectrometry at 965 cm-l absorption band as a measure of nonconjugated trans fatty acids content in margarine samples
M. Franko1, D. Bicanic2 and P. van de Bovenkamp31 Jozef Stefan Institute, Department of Environmental and Analytical Chemistry, Jamova 39, 61111 Ljubljana, Slovenia
2 Laser Photoacoustic Laboratory, Department of Agricultural Engineering and Physics, Agricultural University, Bomenweg 4, 6703 HD Wageningen, The Netherlands
3 Department of Human Nutrition, Biotechnion, Agricultural University, Bomenweg 2, 6703 HD Wageningen, The Netherlands
Abstract
Dual beam thermal lens spectrometry was applied (at 965 cm-1) for the first time to determine the content of trans unsaturated fatty acids in margarine. An improvement in sensitivity (LOD=0.002%) of more than two orders of magnitude in comparison with traditional infrared technique was achieved.
© EDP Sciences 1994