Home / Standards / GB/T 223.31-2026 GB/T 223.31-2026 Upcoming Iron, steel and alloy—Determination of arsenic content—spectrophotometric method and iodimetric method 钢铁及合金 砷含量的测定 分光光度法和碘量法 Standard Type GBT ICS 77.080.01 CCS H11 Status 即将实施 Issue Date 2026-02-27 Implementation 2026-09-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A