TLC-FID法测定延迟焦化原料油族组成

TLC-FID METHOD FOR DETERMINING THE GROUP COMPOSITION OF DELAYED COKING FEEDSTOCK OIL

用三种不同极性展开剂在棒状薄层色谱棒上较好地将延迟焦化原料油分离为饱和烃、芳烃、胶质和沥青质四个族组分,建立了用棒状薄层色谱法-氢焰检测器(TLC-FID)快速测定延迟焦化原料油族组成的方法。通过重复性试验考察本方法的精密度,四组分相对标准偏差均小于3.00%,极差值均小于3.50%。

A rapid method for analyzing the group compositions of delayed coking feedstock oil by rod-shaped thin-layer chromatography with flame ionization detector(TLC/FID)is investigated.The sample is separated into four group-components(saturated hydrocarbons,aromatics hydrocarbons,glial substances,and asphaltenes)by using three different polar developing agent with rod-shaped thin-layer chromatographic column.The precision of this method is evaluated through repeated experiments,and relative standard deviation of the four components is less than 3%,extreme difference values are all less than 3.5%.