| Popis: |
This paper describes the separation of branched-chain and straight-chain compounds using a column chromatographic method. The mixture to be separated is incorporated, before the column is packed, into the stationary phase, which consists of urea and Celite. Elution with light petroleum yields branched-chain materials; subsequent elution with methanol gives straight-chain material. The efficiency of the method is compared witht that of a previously known procedure, also involving urea inclusion compounds. Some experiments using thin layers containing urea are also described. |
