Page 36 - Basic Gas Chromatography
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Overview   expensive   hand   automated   universal   for   samples   vaporization   overheating   solvent,   injecting   plunger   needle   remov-   a   volumes,   is   useful   A   at   is   all   into   liquids   liquid

     i   23   Devices  Sampling   and   Inlets  Sample   an   with  diluted   be   can  sample   the  viscous,   too   If  syringe.   the   used   split   could   solvent.   and  appropriate   the   Hold   inject.   to   plan   you   than  syringe   the   into   gives   liquid   more   up   Draw   syringe   the   in   still   air   any   so   up  pointing   needle   the   with  vertically  syringe   the   reads   it   until  plunger   the  Depress

      Instrument   commonly   most   less   the   on   easily   small   only   almost   the   sizes   used   liquid   the   rapid   avoid   appropriate   for   used   steel  stainless   The  glass.   have  models   smaller   syringe   size.   in   volume   exclude   to   liquid   Viscous   viscous   a   of




            the   flexible,   valve   more   vaporize,   are   where   allow   to  taken   typically   borosilicate   For   gas-tight   milliliters   sample   desirable   drawing   PLUNGER   /   7)
            are    be   can    Syringes   commonly   to   be   an   The   Other   barrel.   total   liquid.   expulsion   volume.
            valves   more   is   gas-sampling   and   valves.   on   they   most   situations   injectors)   must   them   in   syringe   solutions.   of   barrel.   the   of   10-milliliter   about   5   whose   injected.   is   it   repeatedly   the   into   fast   104uL

            sampling   syringe   A   less   skill   details   when   microliters.   The   those   of vaporizing   care   decomposition.   dissolving   solution.   liquid   or   made  barrel   the   into   end   A   to   up   syringe   be   to   liquid,   with   by   back   very   BARREL   |   Microsyringe,



            gas   The   device.   more   considerably   liquids.   In   column,   the   10-microliter   liquids   onto   the   available.   samples   a   volume   accomplished   it   slowly;   2.3.
            and   sampling.   used   requires   for   typically   of   microliters.   types   the   thermal   by   inject   of   precision   epoxyed   also   is   use   the   syringe   expelling   syringe   Fig.
            syringes   gas   frequently   repeatability,   5  Chapter   expand   desirable,   injection   10   all   in   into   in  result   handled   syringe   to   a   shows   microliters   inside   a   is   steel,   screws   that   syringe   gaseous   always   to   than   larger   microliter   be   can   rapidly   the   NEEDLE   |



            Gas-tight   for   most   to   Sampling   liquids   are   for   and   5,   1,   (as  heated   passage   could   Sampling   are best   a  using   2.3   five   to   tightly   stainless   needle   1-microliter   injecting   is   times   Syringe   a   a   This   and   into  drawn


     22       methods   the   better   Refer   Liquid   Since   sizes   method   are   are   before   that   Solid   Solids   by   Syringes   Figure   one   fits   also   able   for   suggestion   two   Using   In filling   initially.   syringe   be
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