Petroleum products and lubricants . determination of polycyclic aromatics in unused lubricating base oils . dimethyl sulphoxide extraction refractive index method 石油产品和润滑剂.未用的润滑基油的多环芳香剂的测定.二甲基亚砜萃取折光指数法
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Methods of test for petroleum and its products - determination of polycyclic aromatics in unused lubricating base oils and asphaltene free petroleum fractions - dimethyl sulphoxide extraction refractive index method 石油和石油产品试验方法.第102部分:未用的润滑基油和不含沥青烯的石油馏分物中多环芳香族环烃的测定.二甲硫析取物折射指数法
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