Home / Standards / GB/T 39144-2020 GB/T 39144-2020 Active Test method for magnesium content in gallium nitride materials—Secondary ion mass spectrometry 氮化镓材料中镁含量的测定 二次离子质谱法 Standard Type GBT ICS 77.040 CCS H17 Status 现行 Issue Date 2020-10-11 Implementation 2021-09-01 Responsible Dept 国家标准委 Drafting Unit N/A