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. Franko; D. Bicanic; P. van de Bovenkamp

doi:doi:10.1051/jp4:19947112

Numéro		J. Phys. IV France Volume 04, Numéro C7, Juillet 1994 8th International Topical Meeting on Photoacoustic and Photothermal Phenomena 8 ITMP³ / 8éme conférence internationale de photoacoustique et photothermique


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

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 Bovenkamp³

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

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.