Page 143 - Basic Gas Chromatography
P. 143

129                                    DC-200   and  Concepts   John   of   the   of   com-   of   clearly   8.3   example.   identifica-   identify   a   in   transferred   to  subjected   characteristic   are  FTIR)   derivati-   meth-  these   qualitative   is  technique   (GC-FTIR).


                   DETECTOR                packed   a   on   Chromatography:   courtesy  Reproduced   ratios   the   classes   of   Figure   in   this   in   an   to   lead   and  column   effluents  collecting   be   could   UV),   a  produce   and   (MS   pyrolysis,   to   for  method


                 FLAME                     sample       from   or   data   aromatics   can   GC   sample   NMR,   to   are   References   identification   chromatography
                   IONIZATION         500   X   MV   1   gasoline   of   M.,   J.   83.   p.   1987,   8.3)   characteristic   the   from   and   ratio   the   class.   a   from   for  setup   trapped   FTIR,   reagent   instruments   identification   premier   the   gas






                    1S                     analysis   Miller,   York,   (Fig.   often   ratios   olefins,   index,   given   a   effluent   simple   (MS,   useful   for   chromatograph.   as   complementary   to
                 }                       “0   From                              The   chemical
                                           GC             are      within   the            used             coupled
                                           of   Corp.   New   Inc.,   chromatograms   latter   that   the   paraffins,   retention   Tests   collect   A   8.5.   identification   a   with   most   be   mentioned   A

                 ELECTRON   DETECTOR       presentation   Perkin-Elmer   Sons,   &   the   The   shows   the   with   homolog   and   could   instrument.   Figure   in   for   reacted   the   on-line.   can   that   molecular  weight   8.1.   Table   been   10).   infrared

   Analysis        CAPTURE                 channel   of   Wiley   Inc.   of   responses.   8.4  Figure   between   combined   particular   Instruments   one   suitable   shown   instrument   or   Commonly,   coupled   methods   the   in   given   Instruments   already   has   Chapter   (see   Transform



  Qualitative                              Dual   8.2.   Fig.   Courtesy  column.   Contrasts,   John   Sons,   &   Wiley   inspection   by   detector   pounds.   differentiate   When   a   of   tion   Off-line   principle,   In   any   on   it   is   trap   cold   an   to   microanalysis,   derivative.   usually   Other   and  zation,   are   ods   On-line   GC-MS   analysis   Fourier










   Analysis                                         alcohol   alcohol   alcohol   alcohol   J   min.   M.,   J.  Miller,   1987,   76.   p.   the   at   detectors   of  classes   parallel   made   be



   Quantitative                                     Methyl   a.   alcohol   Ethyl   b.   n-Propyl   c.   n-Butyl   d.   n-Amyl   e.   !   36   From   New   York,   parallel   in   The   different   producing   can





   and                                     alcohol                              l   30   standards.   Inc.,  Sons,   detectors   detection.   for   Identifications
   Qualitative                        j   24   Unknown                         l   24   Standard   using  times   Wiley   &   different   channel   sensitivity   simultaneously   8.2.



                                        18
                                      |
                                           fa}                                 |   18   (b)   Inc.    dual   in   Figure
                                    |    |  |  |  |  |  |                              retention   John
                                                     d                                     Sons,    two    recorded   in
                                       12                                              by   &       of   called   differences
                                                                               |   12    Contrasts,          shown
                                                                                       unknown   and   the
                                   —_—t   oe                                               Wiley    use   are
                                     —jto                                                  John         major   signals   those
                                                                               !   6               is
                                   —  po                                               of             column—so
                                                                                                      GC   a   should
        ~                              oe                                                Concepts   of   have   like
                              Inject                                    Inject   i |      lL   0   Identification   courtesy   interesting   Both


   128                                                                                 8.1.   Chromatography:   Reproduced   More   of   chosen   compounds.   chromatograms
                                                                                       Fig.           exit
   138   139   140   141   142   143   144   145   146   147   148