Home / Standards / GB/T 9724-2007 GB/T 9724-2007 Active Chemical reagent - General rule for the determination of pH 化学试剂 pH值测定通则 Standard Type GBT ICS 71.040.30 CCS G60 Status 现行 Issue Date 2007-09-26 Implementation 2008-04-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A