[mechi]

Hi, I work in an environmental lab and i have a problem with the analysis of Texas 1005-1006. Is used to separate aliphatics and aromatics hydrocarbons. In the first extract I collect the aliphatic fraction and in the second, the aromatic fraction. The problem is that I can't separate them. I collected both fractions on the first time.
I tried a lot of methods but nothing was usefull.