Home / Standards / GB/T 45020-2024 GB/T 45020-2024 Active Methods for chemical analysis of niobium hafnium alloys—Determination of trace impurity elements content—Inductively coupled plasma mass spectrometry 铌铪合金化学分析方法 痕量杂质元素的测定 电感耦合等离子体质谱法 Standard Type GBT ICS 77.120.99 CCS H14 Status 现行 Issue Date 2024-11-28 Implementation 2025-06-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A