Page 172 - Basic Gas Chromatography
P. 172

Topics  GC-MS   1?   size,  small  simplicity,   of  advantages   the   has  analyzer  quadrupole   The   systems.  GC—MS   for   ideal   it   make   which  scanning   rapid   and   cost,  moderate   compared  resolution  when   low   has   and  Daltons   2,000   about   to  restricted   is   It   spectrometers.   mass  focusing  double   to   was   which  analyzer   mass   trap   ion   an  schematically   shows   10.7  Figure   quadrupole   th



   Special   i                                    240   il   T   250   240).   Dependin  current potentials   and   be   Detector   7

                                                           =        rods.   rods   and
                                                    4—1   T   200   (MW   four   the   rods
                                                           ortal   the   direct   through   the
                                        156                of      to   the   strike                       Quadrupole   analyzer.

                                                      150          pplied   will                              mass
                                                   rT      spectra    and   pass
                                        140        tnm—te   El   and   appli   frequency   will   ratios

                                                          CI       also   ratio                               Quadrupole
                                                   {   100   of    is     m/z
                                        I.                           radio
                                        E.                Comparison   frequency   of  the   mass-to-charge   other   Fig.   10.6.

                                                     50
                                                   T                      with
                                                          10.5.    radio   one   Ions
                                                          Fig.     A  Tadi   combination
         100                                    20   0                 of   only   detector.               ,

  158   JONVONNAY  SALLY 1aY¥     JONVONNEY  SAILV14u              reversed.   the   on   ions   ine   ated.   Source
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