NBN T 03-265-1980 工業(yè)用磷酸和磷酸鈉(包括食品),氟含量的測(cè)定.茜素氨絡(luò)和硝酸鑭光度測(cè)定法
Phosphoric acid and sodium phosphates for industrial use (including food-stuffs) - Determination of fluorine content - Alizarin complexone and lanthanum nitrate photometric method