Home / Standards / GB/T 46133-2025 GB/T 46133-2025 Active General rule for determination of nitrogen content by Dumas combustion method 杜马斯燃烧法定氮分析方法通则 Standard Type GBT ICS 71.040.40 CCS N04 Status 现行 Issue Date 2025-08-29 Implementation 2026-03-01 Responsible Dept 科技部 Drafting Unit N/A