【作者】 吕振波； 陈刚； 翟玉春； 赵杉林；

【Author】 Lü Zhen-bo~(1,2),CHEN Gang~3,ZHAI Yu-chun~2,ZHAO Shan-lin~1(1. Liaoning University of Petroleum & Chemical Technology, Fushun 113001, China;2. College of Materials & Metallurgy Northeastern University, Shenyang 110005, China;3. Fushun Chemical Plant of Ethylene, Fushun 113005,China)

【机构】 辽宁石油化工大学分析中心； 抚顺乙烯化工厂； 东北大学材料冶金学院；

【摘要】 <正>石油酸是非常复杂的羧酸混合物,主要集中在原油210～420℃馏分中,即使采用高分辨色谱也无法将其组分一一分开。近年来,随着质谱技术的不断发展,应用质谱来研究石油酸的组成被认为是较理想的方法。在最初的质谱法研究中,采用电子轰击直接质谱进样分析或色谱-质谱联机分析,由于电子轰击产生太多的石油酸碎片离子,使得结构特征不明显,而色谱-质谱联机分析只适用于低分子量和易挥发的有机酸,难以进行准确的分析和鉴定。采用负离子FAB-更多还原

【Abstract】 The petroleum carboxylic acids in the 200～430℃ distillates of Liaohe crude oil were separated by the extraction with alkali-alcoholic solution and Freon-113 solvent. The relate to composition and structure of naphthenic acids were obtained by the use of FAB-MS techniques, The results indicated that the molecular weight distribution of naphthenic acids in Liaohe distillates 200～430 ℃ was about 142～484 Da, and the carbon number distribution was about C₈～C₃₃. The contents of monocyclic, bicyclic and tricyclic naphthenic acids were higher than others.更多还原