BS 4427-13-1982
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.工业(包括食品)用缩聚磷酸盐.钙含量测定.火焰原子吸收光谱法
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 calcium content - flame atom