Home / Standards / GB/T 16658-2026 GB/T 16658-2026 Upcoming Determination of copper, cobalt, nickel, zinc, chromium, cadium and lead in coal 煤中铜、钴、镍、锌、铬、镉、铅的测定方法 Standard Type GBT ICS 73.040 CCS D21 Status 即将实施 Issue Date 2026-03-31 Implementation 2026-10-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A