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Analysis  Quantitative  Analysis   141      REFERENCES   (%)   Error   3rd  Chromatography,  Practice  of Gas  Modern   J.   F.  Debbrecht,   .   Wiley,   Ed.,  Grob,   L.   R.   ed.   1.0   393-425.   pp.   1995,   York,   New   0.2   Advances   A.,   D.  Leathard,   .  Dekker,   Ed.,  Giddings,   C.   J.   13,   Vol.  Chromatography,   in   NY,   0.1   265-304.   pp.   1975,   0.3   in  Advances   G.,  7,  Blomberg,  Chpt.  L.   .  Dekker,



     Quantitative   Relative    spiking   workup.   the   but   interest.   It   manual   incremental   amount   of   the   to   used   seen   Note   plot.   the  represents   amounts   a   straight   the   on  value   the   preparation   of   different  ways   for   need   standard   the   the   In   benzene   neighboring   This   better   in   RSD




     and      SD   +   (%)      general,   sample   sample,   the   of   with   additional,   the   to   determine   be   can   easily   more   calibration   it   As  increasing   producing   amount,   absolute   the   several   that   the   combining   method.   ethyl  chose   unknown   data.   their   provided   were using.   0.1%   8.5.
     Qualitative   Analysis      GC   by      0.02   +   11.54   0.02   +   16.91   33.17   0.02   +   0.03   +   38.38      In  other.   during   to  added   analyte   the   as   limitation   a   the   that   proportional   to   used   Equations   is   addition   added;   is   increases,   “unknown”   the   practice,   performed   in   suggested   by   standard   they   an   referenced   and   size   they   down  about   to   Table   in





           Quantitative   Determined   each   recoveries   also   is   same   the   volume,   is  method   is  standard   be   can   sample.   principle   the   standard   standard   determined.   signal   the   original   abscissa;   the   actual   In   be   [18]   have   eliminated   be   internal   petroleum,   in   they   used   they   on  sample   method   accurate,   shown   are



           GC   (%)             with   and   standard   is   sample   this   the   proportionality   original   but   typical   no   be   to   sample,   the   crosses   of  results  can   co-workers   can   situ   in   but   to   which   results
           of   Weight   11.66   16.94   33.14   38.26   confused   losses   standard   of   a   when   is   it   concentration.   volume   an   hydrocarbons   dependency   normalization   very
           Example   True       be   evaluate   Addition   the   the   reproducible   adding   this   the   in   calculations,   shows   present   which   the   to   find   To   until   calculation   and   with   addition,   standard   the   be   can   typical



           85                   not   to   method   as   principle   by   and   analyte   8.8   is   concentration,   added   extrapolated   original   Matisova   sample   method   of   for   internal   area   the   results   Some

    140   TABLE   Component   n-Cig   a-Cyy   n-Ci2   n-Ci3   should   used   Standard   this   In   chosen   highly   jection.   The   produced   added,   of   necessary   Figure   signal   are   calibration.   the   is   and   the   ducible   tion   analysis   standard   an   eliminated   than   Summary   GC   case.
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