作废
BS 5688-5-1979 工业用硼酸、氧化硼、四硼酸二钠、高硼酸钠与粗硼酸钠的试验方法.第5部分:硼酸、氧化硼、四硼酸二钠和粗硼酸钠中硫化合物的测定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 sulphur compounds in boric acid, boric oxide, disodium tetraborates