BS 4427-15:1982
工業(yè)用三磷酸鈉(三磷酸五鈉)和焦磷酸鈉(焦磷酸四鈉)的試驗方法.工業(yè)(包括食品)用縮聚磷酸鹽.氮氧化物含量測定.3,4-二甲苯酚分光光度法
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 oxides of nitrogen content -