Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use - Condensed phosphates for industrial use (including foodstuffs) - Determination of arsenic content - Silver die
Applicable to products having arsenic contents equal to or greater than 0.2 mg/kg. Cross-refers to the general method of BS 4404, the possession of which is essential.