Introduction of large volumes of water-containing samples into a gas chromatograph. Improved retention of volatile solutes through the swing system.
The swing system is designed for introducing large volumes of water-containing samples into a gas chromatograph. Sample evaporation and solvent-solute separation are performed in separate compartments. This widens the application range to compounds of higher volatility. Sample evaporation takes place in a hot chamber packed with Carbofrit. Solvent-solute separation is performed in a cascade of increasing powers of retention. While high boiling solutes are retained in an oven-thermostatted retaining precolumn, the more volatile components are retained by a packed bed of sorbents of increasing powers of retention situated in a programmed temperature vaporiser. For elution, the gas flow is reversed and the solutes are discharged from the heated packed bed through the retaining precolumn into the separation column.
Pocurull
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Rovira i Virgili University, Department of Analytical Chemistry and Organic Chemistry, Imperial Tarraco, Tarragona, Spain.
Biedermann
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Grob
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K
D002849:Chromatography, Gas / Q000295:instrumentation / Q000379:methods*; D005227:Fatty Acids / Q000032:analysis / Q000737:chemistry; D009330:Nebulizers and Vaporizers; D012015:Reference Standards; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
D005227:Fatty Acids; D014867:Water