Home / Standards / GB/T 27501-2011 GB/T 27501-2011 Active Preparation method of buffer solutions for the measurement of pH value pH值测定用缓冲溶液制备方法 Standard Type GBT ICS 71.040.01 CCS N53 Status 现行 Issue Date 2011-10-31 Implementation 2012-01-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会