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
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