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2. Determining physical characteristics
Determining the physical characteristics of a fatty substance is a simple and straightforward way of gaining an initial analytical insight into its nature.
2.1 Density – Density
Density is determined using a pycnometer according to the standardized method NF EN ISO 6883 (Fats of animal and vegetable origin – Determination of conventional density (weight per liter in air). Absolute density can be expressed (in a vacuum), but as this determination is generally used to transform a mass of oil into a volume, we prefer to use the weight per liter of oil in air. The methods refer to the density of water, which differs according to the ISO or IUPAC method (table
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Determining physical characteristics
Determination of chemical indices
Bibliography
Regulations
Arrêté du 19 octobre 2006 relatif à l'emploi d'auxiliaires technologiques dans la fabrication de certaines denrées alimentaires (JO du 02/12/2006.
February 12, 1973. List of substances authorized for use in the refining and processing of edible fats (JO du 15/02/1973).
Arrêté du 1 er octobre 1986, relatif à la méthode officielle...
Organizations
Standards bodies
French Standards Association (AFNOR) http://www.afnor.com
American Oil Chemists' Society, (AOCS) http://www.aocs.org
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