EXPERIMENTAL AND THEORETICAL RELATIVE RESPONSE FACTORS FOR A PULSED DISCHARGE KRYPTON PHOTOIONIZATION DETECTOR

The relative photoionization cross sections (RePIX) have been determin ed for a series of compounds normalized to benzene. The detectors are doped (5.01% Kr) Kr-PDPID and pure helium(He-PDPID) pulsed discharge h elium photoionization detectors. The pure helium detector is used to r eference the responses. The magnitudes for the Kr-PDPID varied from ab out 0.0 to 0.95. In order to understand the relative responses of thes e compounds in the Kr-PDPID, the SCF-MO energy levels were calculated for these compounds using HyperChem. Calculated vertical ionization po tentials are compared with experimental adiabatic ionization potential s.