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Unformatted text preview: Dennis Uzar C103 Lab 2/22/11 Erick Pasciak Title: Identity of the White Powder Part 2 Results and Discussion TLC or thin layer chromatography is an analytical technique used to identify unknown and possibly illicit substances. Thin layer chromatography is closely related to gas chromatography and high performance liquid chromatography. In general thin layer chromatography is the test used to identify a substance classified as illicit by the chemical spot test. It is used after a chemical is identified by a CST because of the broadness of the results of the chemical spot test gives. TLC uses a mobile and stationary phase where the stationary phase is a thin layer of absorbent particles, in this case silica gel, that the analyte is spotted onto and carried up the plate via the mobile phase. The mobile phase is a single solvent or mixture of solvents, which in this experiment was a ratio of 9:1 diethyl ether/methanol. The absorbency of the TLC plate causes the mobile phase to rise up along with the compounds which are carried up...
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This note was uploaded on 02/22/2012 for the course CHEM-C 103 taught by Professor Jillrobinson during the Spring '08 term at Indiana.
- Spring '08