Home / Standards / GB 6857-2008 GB 6857-2008 Active pH primary reagent - Potassium hydrogen phthalate pH 基准试剂 邻苯二甲酸氢钾 Standard Type GB ICS 71.040.30 CCS G61 Status 现行 Issue Date 2008-12-31 Implementation 2009-06-01 Responsible Dept 工业和信息化部 Drafting Unit N/A