JIS G1258-4-2007 铁和钢.电感耦合等离子(ICP)原子发射光谱分析法.第4部分:铌含量的测定.磷和硫磺酸中分解或酸中分解及硫酸钾中熔化
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