Home / Standards / GB/T 31590-2025 GB/T 31590-2025 Upcoming Analytical method of chemical composition for flue gas DeNOx catalysts 烟气脱硝催化剂化学成分分析方法 Standard Type GBT ICS 71.100.99 CCS G74 Status 即将实施 Issue Date 2025-12-02 Implementation 2026-07-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A