Defining Plate Height    overhead(24-5)

Kinetics / The VanDeemter Equn / Column Efficiency   overheads

H = B/u + C_su + C_mu
 

GAS CHROMATOGRAPHY

    -    Gas-Liquid

    -    Gas-Solid

    -   Capillary

    -    Carrier gases

        -    inert Argon, Helium, Nitrogen,CO2, H2.
        -    normal flow rates    10-50psi inlet pressure
                flow = 25-150mL/min with packed
                            1-25mL/min cap

    -    Sample injection
                                introduce sample as a plug
                                typical injector overhead

    -    Columns and Temperatures

        -    most are cap.

            -  glass, fused silica, teflon        2m to 150m long  with 0.1-0.5mm  id

            -    some packed                             1m max with 2-4mm id    overhead

            -    Fixed Temperature, or Ramped T
 

Periodic Table

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This document was last modified on Sunday, January 31 1999.