Home / Standards / GB/T 18609-2011 GB/T 18609-2011 Active Determination of acid number of crude oil by potentiometric titration 原油酸值的测定 电位滴定法 Standard Type GBT ICS 75.040 CCS E21 Status 现行 Issue Date 2011-09-29 Implementation 2012-01-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委