This International Standard specifies a method for the determination of the salt content of all types of butter containing more than 0,1 % (mass fraction) salt. NOTE If the method is used for the analysis of butter with a low salt content, the expected relative precision figure will be higher than for salted butter; see also Reference [4].
BS ISO 15648:2004 history
2004BS ISO 15648:2004 Butter - Determination of salt content - Potentiometric method