Page 407 - Instrumentation Reference Book 3E
P. 407

390  Chemical analysis: gas analysis

                                            UV  lamp







                                            Ionization chamber
             E
             si
             e



















             Figure  18.7  Photo-ionization detector.




















                        -Alkanes   > C,







                                                      Alkenes (except C,H,)
                                 11             10             9
                                         Energy (eV)
                                      f---
              Figure 18.8  PID response for thevarious ultraviolet lamps
   402   403   404   405   406   407   408   409   410   411   412