ISO 3433:2008 Preview
Cheese -- Determination of fat content -- Van Gulik method
ISO 3433│IDF 222:2008 specifies the Van Gulik method for the determination of the fat content, as a mass fraction, of cheese.
This method is applicable to all types of cheese. However, it may not give completely satisfactory results when applied to cheeses with an internal mould (blue-veined cheeses).