JIS G 1258-4:2007
鐵和鋼.電感耦合等離子(ICP)原子發射光譜分析法.第4部分:鈮含量的測定.磷和硫磺酸中分解或酸中分解及硫酸鉀中熔化
Iron and steel -- ICP atomic emission spectrometric method -- Part 4: Determination of niobium content -- Dissolution in phosphoric and sulfuric acids or Dissolution in acids and fusion with potassium disulfate