Ch24-TCF

Ch24-TCF - Gas-Liquid Partition Chromatography (GLPC) aka...

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1 Gas-Liquid Partition Chromatography (GLPC) Chapter 24 aka Gas-Liquid Chromatography (GLC) aka Gas Chromatography (GC) For volatile liquid or gaseous solutes Solute is carried by a gaseous mobile phase over a stationary phase on the inside of an open tubular column or on a solid support
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2 GC Columns Nowadays, almost always capillary columns A coiled capillary column . Usually made of fused silica (glass) coated with a polymer for mechanical strength.
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GC Columns 3 Your GC 0.32 mm id, 0.25 μm, 30 m
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4 The choice of liquid stationary phase is based on the rule “like dissolves like” e.g., Nonpolar columns are best for nonpolar solutes
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5
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6 GC and LC with chiral phases can separate optical isomers (enantiomers)
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7 Zeolite molecular sieves Aluminosilicate minerals with framework interconnections that produce a cavity into which small molecules can enter
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8 Carbon layer Fused silica tube wall A porous carbon stationary phase in a capillary column. GC of vapors in the headspace of a beer
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This note was uploaded on 03/28/2011 for the course CHEM 300L at USC.

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Ch24-TCF - Gas-Liquid Partition Chromatography (GLPC) aka...

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