美利体育登录入口官网:BS 5688-6:1979
工业用原硼酸(硼酸),三氧化二硼(氧化硼),四硼酸二钠,高硼酸钠与粗硼酸钠的试验方法 硼酸,氧化硼和四硼酸二钠中锰含量的测定
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 manganese content of boric acid, boric oxide and disodium tetraborate