Home / Standards / GB/T 223.70-2008 GB/T 223.70-2008 Active Iron, steel and alloy - Determination of iron contents - O-phenanthroline spectrophotometric method 钢铁及合金 铁含量的测定 邻二氮杂菲分光光度法 Standard Type GBT ICS 77.080.01 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