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ABSTRACT High performance liquid chromatography (HPLC) was applied to four commercial grade Saudi Arabian crude oils having API gravity in the range 28 to 38 for the determination of hydrocarbon group types namely asphaltenes, saturates, aromatics and polars. Each of these crude oils was separated into asphaltenes and maltenes using n-hexane as the precipitating solvent. The maltenes (n-hexane soluble) were fractionated into saturates, aromatics and polars fractions by n-hexane elution on a column packed with amino propylsilane chemically bonded to porous silica particles. The data obtained shows that the weight percent saturates increase whereas aromatics, polars and asphaltenes decrease from Arab Heavy to Arab Bern through Arab Medium and Arab Light crude oil. The results obtained from HPLC were in comparison with those obtained from ASTM method D2007. This method is easier, faster and offer good repeatability. This method can be applied to other crude oils. 相似文献
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作者针对原油和沥青族组份柱层析分离中存在的问题,采用离心薄板层析法,借助离心作用使样品得到很好分离.实验证明,该方法具有切割点清晰直观、分离效果好等优点,特别是芳烃的分段切割,色环相当清晰. 相似文献
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高效液相色谱测定蒽醌 总被引:1,自引:0,他引:1
研究了高效液相色谱法分析蒽醌法制过氧化氢工作液的主成分。以反相 C1 8柱 ,甲醇水 (体积比为 67∶33)为流动相 ,快速分离分析 2乙基蒽醌 ( EAQ)、四氢 2乙基蒽醌 ( H4EAQ)、重芳烃和磷酸三辛酯。同时讨论了上述物质的最佳紫外吸收波长 ,EAQ测定量在 1 6~ 1 60 ng,H4EAQ在 2 4~ 2 4 0 ng范围内的吸光度线性相关系数分别为 0 ,9997和 0 .9994 ,方法回收率均在 99%以上 相似文献
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高酸劣质原油的破乳脱盐成为加工企业迫切需要解决的技术难题。采用组分分析和原油破乳脱水方法,对荣卡多、多巴和阿尔巴克拉3种典型高酸原油的主要组成和乳化特性进行研究,结果表明:高酸原油不仅含有环烷酸,而且还含有一定量的环烷酸盐;环烷酸和环烷酸非碱金属盐基本不影响高酸原油破乳,但环烷酸钠具有较强的表面活性,对原油乳化作用强,是导致高酸原油破乳困难的主要因素。 相似文献
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介绍了用反相液相色谱法定量分析三苯基磷。使用 ODS( 2 50× 4 .6 mm,1 0μ)不锈钢柱 ,以甲醇水 ( 4∶1 )为流动相 ,流速为 1 .5m L/ min,紫外检测器 ,波长 2 54nm,在浓度 0 .4~ 0 .6 mg/ m L的范围内具有较好的线性关系 ,相关系数 r=0 .999。本方法适用于工业三苯基磷产品的定量分析 相似文献
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Abstract High resolution capillary gas chromatography studies, were performed to compare and group oils from three different Kuwaiti wells completed in the same structural sand. These groupings contributed to the identification of the nature, origin and maturity of the crudes under study. Analysing the fingerprint gas chromatograms of the three Kuwaiti crude oils, it was found that the crudes are from a carbonate rock source origin. The chromatographic fingerprints showed that two of these crudes are almost identical in composition and belong to the same reservoir, while the other crude is different in its composition reservoir source. 相似文献
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High resolution capillary gas chromatography studies, were performed to compare and group oils from three different Kuwaiti wells completed in the same structural sand. These groupings contributed to the identification of the nature, origin and maturity of the crudes under study. Analysing the fingerprint gas chromatograms of the three Kuwaiti crude oils, it was found that the crudes are from a carbonate rock source origin. The chromatographic fingerprints showed that two of these crudes are almost identical in composition and belong to the same reservoir, while the other crude is different in its composition reservoir source. 相似文献
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HPLC在屏蔽酚类抗氧剂合成中的应用 总被引:1,自引:0,他引:1
研究了位阻型酚2,6-二叔丁基苯酚合成屏蔽酚类抗氧剂L135反应混合物中中间产物、目标产物、剩余原料及杂质和副产物的反相高效液相色谱(HPLC)分离条件。在给定的色谱条件下,反应原料、中间和目标产物都能达到基线分离,精密度良好。 相似文献
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建立了用苯甲酰氯衍生高效液相色谱法测定 1 ,2丙二胺的方法。优化了衍生反应条件和色谱分离条件。衍生物用反相色谱分离 ,流动相组成为甲醇∶水 =60∶ 4 0 ( V/V)。方法的相对标准偏差为 0 .1 2 % ,1 ,2丙二胺平均回收率为 98.91 % ,标准曲线方程为 y=0 .1 0 1 5x-0 .0 0 4 6,γ=0 .9999。 相似文献
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介绍了反相液相色谱法定量分析橡胶硫化促进剂二硫化硫醇基苯并噻唑的纯度分析方法。用 HP1100型高效液相色谱仪,ZORBAX RX-C18(250 mm×4.6 mm,5μm)色谱柱,流动相 V(甲醇):V(水)=3:1,λ=280 nm,流速1.0 mL/min,柱温25℃,对二硫化硫醇基苯并噻唑纯度进行定量测定。该法重复性好,相对标准偏差为0.11%,标准回收率在99.8%~100.2%,定量结果准确度高。 相似文献
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复合型原油降凝降粘剂EMS的研制 总被引:10,自引:2,他引:10
由EVA、MVA和表面活性剂复配成功了一种复合型降凝降粘剂MES,它对大庆、江汉和冀东石蜡基原油均有良好的降凝和降粘作用,对冀东沥青基稠油有一定降粘作用。本文了EMS的研制和室内性能测定结果。 相似文献