Home / Standards / GB/T 268-1987 GB/T 268-1987 Active Petroleum products--Determination of carbon residue--Conradson method 石油产品残炭测定法 (康氏法) Standard Type GBT ICS 75.080 CCS E30 Status 现行 Issue Date 1987-07-03 Implementation 1988-05-01 Responsible Dept 国家标准委 Drafting Unit N/A