NBN T 03-357-1981 工業(yè)用硼酸;氧化硼;四硼酸鈉;過(guò)硼酸鈉和天然硼酸,鐵含量的測(cè)定.2,21-聯(lián)吡啶光度測(cè)定法
Boric acid, boric oxide, disodium tetraborates, sodium perborates and crude sodium borates for industrial use - Determination of iron content - 2,21-Bipyridyl photometric method