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System Control Toolbar.......................................................................................................151
Main Toolbar...........................................................................................................................................................151
2000 MS Method Basic Scan Functions .............................................................................153
Introduction.............................................................................................................................................................153
2000 MS Method Chemical Ionization.................................................................................155
Introduction.............................................................................................................................................................155
The Chemical Ionization Scan Function.................................................................................................................155
Ion Formation By Chemical Ionization....................................................................................................................157
The CI Parameters .................................................................................................................................................158
Chemical Ionization Using Fixed Parameters ........................................................................................................162
Using Liquid CI Reagents.......................................................................................................................................162
Adjusting the CI Reagent Gas Pressure for Gases Other Than Methane .............................................................165
Tuning for CI Operation..........................................................................................................................................166
Low-Pressure CI vs. High Pressure CI...................................................................................................................166
Recommended Reading.........................................................................................................................................167
2000 MS Method Command Reference...............................................................................169
Spreadsheet editing................................................................................................................................................169
The CI Parameters .................................................................................................................................................175
CI Fixed Parameters...............................................................................................................................................176
Ion Storage (SIS) Parameters ................................................................................................................................177
Customize SIS........................................................................................................................................................177
The MS/MS Ion Prep Method.................................................................................................................................178
The MS “q” Calculator ............................................................................................................................................178
Ion Preparation MS/MS ..........................................................................................................................................183
MS
n
.........................................................................................................................................................................185
2000 MS Method Electron Ionization ..................................................................................189
The Electron Ionization Scan Function with Automatic Gain Control (AGC) .........................................................189
Ion Formation..........................................................................................................................................................190
AGC Prescan..........................................................................................................................................................190
Mass Scanning .......................................................................................................................................................191
Basic Equation of the AGC Software .....................................................................................................................192
Software Parameters..............................................................................................................................................193
2000 MS Method Ion Preparation
........................................................................................199
The Ion Preparation Method...................................................................................................................................199
Theory of Operation of the SIS Option ...................................................................................................................201
Selected Ion Storage (SIS) Parameters.................................................................................................................202
Customize SIS........................................................................................................................................................203
Tips for Using SIS...................................................................................................................................................205
The MS “q” Calculator ............................................................................................................................................205
2000 MS Method MS/MS Option: Theory of Operation.....................................................207
Overview.................................................................................................................................................................207
The MS/MS Ion Prep Method.................................................................................................................................212
The MS “q” Calculator ............................................................................................................................................214
Customize Non-resonant Method...........................................................................................................................214
Customize Resonant Method ................................................................................................................................217
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