ASTM D6304 石油产品、润滑油和添加剂中水含量的测定 卡尔费休库仑滴定法(试验步骤C 水分蒸发器间接滴定法)。 ASTM D6304-20 Standard Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration. Procedure C (Water Evaporator or Oil Vaporizer Accessory)