BS 4427-10-1976
工业用三磷酸钠(三磷酸五钠)和焦磷酸钠(焦磷酸四钠)的试验方法.氧化磷(V)总含量测定:磷钼酸喹啉重量法
Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use - Determination of total phosphorus (V) oxide content: quinoline phosphomolybdate gravimetric method