Home / Standards / GB/T 33317-2025 GB/T 33317-2025 Active Plastics—Determination of hexamethylenetetramine content in phenolic resins—Kjeldahl method,perchloric acid method and hydrochloric acid method 塑料 酚醛树脂中六次甲基四胺含量的测定 凯式定氮法、高氯酸法和盐酸法 Standard Type GBT ICS 83.080.10 CCS G31 Status 现行 Issue Date 2025-10-05 Implementation 2026-05-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A