CHAPTER PAGE 



Cryo-focusing GC/MS 240 



Purge and trap GC/MS 260 



Case Study Comparison of Emanations between Subjects .... 270 



Case Study Comparison of Bio-assay to GC/MS Assay 278 



Conclusions 283 



Identified Emanations 283 



GC/MS Assay of Subjects with Different Attraction Levels . . 283 



Bio-assay versus GC/MS Assay 284 



6 CONCLUSIONS AND FUTURE WORK 285 



Conclusions 285 



Future Work 288 



APPENDIX 



CARBON DIOXIDE AS A CI REAGENT GAS 294 



Introduction 294 



High Pressure Charge Exchange Mass Spectrometry 295 



Electron Capture Negative Ion Chemical Ionization 297 



ECNCI with Carbon Dioxide 298 



Instrument Optimization and Background Ions 299 



Selected Examples 314 



Summary 324 



REFERENCE LIST 325 



BIOGRAPHICAL SKETCH 333 



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