學振第19小委員會の鐵及び鋼窒素分析法に就て

抄録

Various methods to determine the nitrogen content of iron and steel are now adopted in the Japanese steel works. The special committee for analysis of gases in iron and steel has carefully studied those methods, and the results obtained have been compared and discussed. At last a new form of distillation apparatus is proposed, and sodium alizarine sulphonate is used for indicator in titration, as in the Bureau of Standards in America. Furthermore Johnson's method is adopted to treat the insoluble residue of the sample