Home / Standards / GB/T 7731.3-2008 GB/T 7731.3-2008 Active Ferrotungsten - Determination of copper content - Bis(cyclohexanone)oxalyldihydrazone photometric method and flame atomic absorption spectrometric method 钨铁 铜含量的测定 双环己酮草酰二腙光度法和火焰原子吸收光谱法 Standard Type GBT ICS 77.100 CCS H11 Status 现行 Issue Date 2008-05-13 Implementation 2008-11-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会