caa a22 4500 465748775 CHVBK 20180323111827.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00322513 doi (NATIONALLICENCE)springer-10.1007/BF00322513 Biological reference materials for the verification of sample preparation and measurement by low resolution NMR [Elektronische Daten] [D. Rutledge, J. Diris, E. Bugner, J.-J. Belliardo] Summary: The measurement of the solid fat index is of great importance to determine the technological quality of fats used in the agro-food industry. Pulse or continuous wave low resolution nuclear magnetic resonance may be used to perform the measurements fairly rapidly, and very simply. IUPAC has published several methods for sample preparation, with precise indications as to the procedure to follow. The reproducibility is however often inadequate, whereas the repeatability is very good. This may simply be due to an incorrect calibration of the apparatus, introducing a constant bias in the results of a particular laboratory. It may also be due to slight differences in the tempering the samples undergo. Because of their polymorphism, the crystallization of triglycerides is in fact greatly influenced by this thermal pretreatment. A need for reference samples was therefore felt, in part to verify the instrument adjustment but, more important, in order to control the whole sequence of actions performed before the measurement itself. The French Institut National Agronomique and the Institut des Corps Gras carried out a ring test involving 9 experienced French laboratories to determine standard SFI curves, using several thermal pretreatment procedures. Reference samples and the corresponding SFI values for 4 of the most commonly used fats are now available to quality control laboratories. This study is now to be extended, through the BCR, to the rest of Europe. Springer-Verlag, 1990 Rutledge D. Institut National Agronomique, 16, Rue Claude Bernard, F-75005, Paris, France aut Diris J. Institut des Corps Gras, Rue Monge, Parc Industriel, F-33600, Pessac, France aut Bugner E. Centre Informatique sur la Qualité des Aliments, 16, Rue Claude Bernard, F-75005, Paris, France aut Belliardo J.-J Commission of the European Community, Community Bureau of Reference, Rue de la Loi 200, B-1049, Brussels, Belgium aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/4(1990-01-01), 441-448 0937-0633 338:4<441 1990 338 216 https://doi.org/10.1007/BF00322513 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00322513 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rutledge D. Institut National Agronomique, 16, Rue Claude Bernard, F-75005, Paris, France aut NATIONALLICENCE 700 1- Diris J. Institut des Corps Gras, Rue Monge, Parc Industriel, F-33600, Pessac, France aut NATIONALLICENCE 700 1- Bugner E. Centre Informatique sur la Qualité des Aliments, 16, Rue Claude Bernard, F-75005, Paris, France aut NATIONALLICENCE 700 1- Belliardo J.-J Commission of the European Community, Community Bureau of Reference, Rue de la Loi 200, B-1049, Brussels, Belgium aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/4(1990-01-01), 441-448 0937-0633 338:4<441 1990 338 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer