Page 102 - Basic Gas Chromatography
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Inlets   Column   OT   Tubing   89      gas   all  HP-PLOT/MoleSieve  Column:   .  mm  x 50  0.53   m  x   30   0.32,   pm   Nitrogen  19095P-MSO   No.   HP  Part   from   Carrier:  Argon   mL/min   4  Helium,   435°C  (3  min)  to  Oven:   120°C   min)  at  25°C/min   (5   require   250  Sample:  split  (ratio  50:1)   pL,   Krypton  limited   Xenon   lower   SCOT   Neon   or   Oxygen   an   with   a   higher   columns.      thick      columns

    and    of   0.25,   vary   occasionally   do   micrometers.   have   show   the   PLOT   contain   coated   a   stable   available   such   suited   A   nitrogen,   6.4.   GC   stainless   layer
    Columns   resolution   of 0.10,  0.20,   lengths   used   however,   to  5.0   they   but   compounds.   Figure   6.3,   the   and   columns   Celite®)   have   and   WCOT   techniques,   SCOT   for   adsorbent   well   are   compounds.   oxygen,   Figure   of   the   nylon,   and   popular  most   Porous   Adsorbent   Q   porous   and



    Capillary   highest   diameters   Typical   been   have   lengths,   but  analysis,   capacity,   volatile   in   the   left,   SCOT   as   phase,   early   the   need   commercially   solid   a   columns   volatile   argon,   shown   in   share   copper,   the   far   Qa   SIEVE,   PORAPAK   column


          the   available.   column   sample   very   shown   on   right.   (such   liquid   to   cross-linking   the   and   still   of   PLOT   as   important   glass,   by   is   PLOT   MOLECULAR   ALUMINA,   (SCOT)
          provide   Tubing  internal   columns   Long  coating  thickness  varies  from  0.1   fast   and   higher   for   only   are  columns   column,   the   on   support   hold   more   common   of   columns,   columns   are   layer   other   and   neon,   column   but   including   silica   @   tubular



          columns   commercially   meter   100   available.   resolution   have   films   used   capillary   tubular   column,   small   solid   can   films   thin   introduction   WCOT   SCOT   tubing.   porous   a   Porapak®.   or   gases   krypton,   of   PLOT   (<5%)   tubing   fused   oe   Liquid   Phase   Support   IN   open  coated



          capillary   millimeters   are   although   commercially   Film   high   Thicker   are  typically   of   types   open   open  tubular   very   of   columns  SCOT   than   the   the   for   few   A   steel   contain   sieve,   fixed   light   separation   molecular   sieve   small   a   TUBING   column   however,  used;   SCOT   AVAILABLE   SILICA   of  support   column.


          Wall-coated  chromatographic  columns.   0.53   meters,   50   are  long  analysis  times.   provide  films   capacity.   and   other   support-coated   layer   layer   phase.   capacity   with   are  possible   disappeared.   stainless   columns   molecular   of  analysis   the   is   a   on   represent   COLUMN   of  types   been   have   NOT   @   FUSED   Comparison   (PLOT)





   88         and   to   10   and   Thin   sample   resolution   The   or   porous   adsorbed   liquid   sample   However,   films   has   only   in   PLOT   alumina,   the   example   xenon   columns   market.   OT   Many   steel   Fig.  6.3.   tubular
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