Analysis of Group Composit of Crude Oil by On-Line Coupling of Capillary HPLC-HTGC
毛细管液相色谱高温毛细管气相色谱在线联用方法在原油族组成分析中的应用

The group composition of crude oil was analyzed by on line coupled capillary HPLC HTGC. After removal of asphaltenes, the oil sample was separated by capillary HPLC into aliphatics, aromatics and resins. The interface cut and stored each fraction, and transfered them into GC sequentially. The group contents of oil were determined by FID. The error of reproducibility(RSD) was less than 3%. The method is accurate, time saving, and easy for operation. It is very important for quality control and development of new and better products in crude oil.