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Full set of Notes with Fill-Ins - San Jose State University

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Chem 155 Unit 17 Chromatography Page 311 <strong>of</strong> 316Types <strong>of</strong> Liquid ChromatographyMost can be performed as HPLC in ‘highperformance’ instrumentation if necessary.Normal Phase:stationary phase: hydrophilic (SiO 2 particles)mobile phase: hydrophobic mobile phase(hexane, methanol).weak solvent: hexanestrong solvent: methanolretained: polar compoundseluted first: non-polar compounds1.1.70 Reverse Phase:stationary phase: hydrobic (SiO 2 particlescoated <strong>with</strong> hexadecane monolayer)mobile phase: hydrophilic mobile phase (water,methanol)weak solvent: waterstrong solvent: methanolretained: non-polar compoundseluted first: polar compoundsPage 311 <strong>of</strong> 316

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