Transcription of Understanding the Capillary GC Column
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Understanding the Capillary GC Column
Understanding the Capillary GC ColumnMark SInnottApplication EngineerThings to Is it Volatile enough to chromatograph by GC? Is it stable enough to survive vaporization? Is it a Gas or a Liquid? How are we getting the Sample Injected? What is the sample Matrix? Can we do sample clean up? Is it an established method?--EPA, ASTM, USP What do we Know about the analytes? What else MAY be present in the sample?Group/Presentation TitleAgilent RestrictedPage 2 Group/Presentation TitleAgilent RestrictedPage 3 Capillary Column TYPESL iquid PhaseCarrier GasPorous Layer Open Tube (PLOT)Wall Coated Open Tube (WCOT)Solid ParticlesCarrier GasGroup/Presentation TitleAgilent RestrictedPage 6 STATIONARY PHASE POLYMERSSiRROSiRROSiRRSiRROnmOSiRRnSilox aneSiarylene backboneR=methyl, phenyl, cyanopropyl, trifluoropropylOHCH2CH2O nPolyethylene GlycolGroup/Presentation TitleAgilent RestrictedPage 7 Stationary Phase% Substitution --polysiloxanes% = # of sites on silicon atoms occupiedBalance is methylOSiRRnSiloxaneR=methyl, phenyl, cyanopropyl, trifluoropropylGroup/Presentation TitleAgilent RestrictedPage 8 Stationary PhasePoly(ethylene) Glycol100% PEG (DB-WAX)Less stab
• HP-PLOT Alumina and GS-Alumina: complex hydrocarbon gas matrices, ethylene and propylene purity, 1,4-butadiene • HP-PLOT Q: freons, sulfides • HP-PLOT U: C1 to C7 hydrocarbons, CO2, Polar Hydrocarbons • GS-GasPro: freons, sulfurs, inorganic gases • GS-CarbonPLOT: inorganic and organic gases
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