thin layer chromatography - Nadia Garcia Chem 3AL Section...

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Nadia Garcia Chem 3AL Section 301 3/31/09 Experiment : Thin Layer Chromatography In experiment seven, our purpose was to determine the thing layer chromatography behavior and Rf values for the components of some over-the-counter NSAID's in four different solvent systems and then determine the identity of the unknown pain-killer. We were given four solvents for part one; ethyl acetate, 92:8 ethyl acetate: acetic acid, 60:40 hexane: ethyl acetate, and 10:10:1 toluene: ethyl acetate: acetic acid. In order to narrow down the choice of TLC solvents used in part II, we worked with TLC plates. The Rf values of the compounds were the most helpful in determining the best solvents. Looking at all four plates, the two solvents that seemed to produce the higher Rf values were 100% ethyl acetate and 10:10:1 toluene: ethyl acetate: and acetic acid. In order to narrow down the possibilities for the unknown pain-killer, we used various criteria. Each group member was given a mixture of compounds to test: student one was given aspirin, the
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This note was uploaded on 04/22/2009 for the course CHEM 3AL taught by Professor Li during the Spring '08 term at University of California, Berkeley.

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thin layer chromatography - Nadia Garcia Chem 3AL Section...

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