This Part of BS 7319 specifies two methods for the determination of water-soluble hexacyanoferrate (II) (anti-caking additives) in salt for food use.
The two methods are applicable to products having levels of hexacyanoferrate (II), as follows.
(a) Direct method. For 2.5 mg to 40 mg of hexacyanoferrate (II) per kilogram of salt.
(b) Filtration method. For 0.25 mg to 4 mg of hexacyanoferrate (II) per kilogram of salt.
NOTE. The titles of the publications referred to in this Part of this British Standard are listed on the inside back page.