BS 4427-11 – Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use
Determination of ortho-, pyro- and tripolyphosphates, and higher condensed phosphate forms, in the absence of tetra– and penta-metaphosphates. To be read in conjunction with BS 4427-10:1976
