BS 5688-21:1979
工業用原硼酸(硼酸),三氧化二硼(氧化硼),四硼酸二鈉,高硼酸鈉與粗硼酸鈉的試驗方法.過硼酸鈉體積密度的測定
Methods of test for orthoboric acid (boric acid), diboron trioxide (boric oxide), disodium tetraborates, sodium perborates and crude sodium borates for industrial use - Determination of bulk density of sodium perborates