Types of Chromatography 0.0 / 5 ? ChemistryFurther Synthesis and AnalysisA2/A-levelAQA Created by: TaehganCreated on: 08-03-18 12:17 What is thin layer chromatography used for? To separate stuff in a mixture 1 of 14 What is the mobile phase of TLC? Liquid solvent (e.g. ethanol) 2 of 14 What is the stationary phase of TLC? Thin layer of silica or alumina fixed to a glass or metal plate? 3 of 14 Identify two ways to reveal colourless chemicals. 1) Add flourescent dyes to silica - UV light 2) Iodine vapour 4 of 14 How do you calculate the Rf value? Distance traveled by spot / Distance traveled by solvent 5 of 14 What is column chromatography mostly used for? Purifying an organic product by separating them from unreacted chemicals or side products 6 of 14 What is the stationary phase of column chromatography? A glass column packed with a solid, absorbent material e.g. aluminium oxide coated with water - a slurry 7 of 14 What is the mobile phase of column chromatography? A solvent 8 of 14 How are samples identified in column chromatography? By the time they take to pass through the column 9 of 14 What is gas chromatography? Separation of a mixture of volatile liquids 10 of 14 What is the stationary phase of gas chromatography? Solid or a solid coated by a viscous liquid (oil) packed into a long column (coiled and built into an oven) 11 of 14 What is the mobile phase of gas chromatography? Unreactive carrier gas e.g. nitrogen 12 of 14 What is retention time dependent upon in gas chromatography? 1) Time spent moving with the carrier gas 2) Time spent absorbed to the viscous liquid 13 of 14 What does GC-MS stand for? Gas chromatography and mass spectroscopy 14 of 14
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