Thermo Scientific FOCUS GC Instruction Manual page 8

Contents
S/SL Injection Techniques..................................................................................................... 101
Split Injection Technique.......................................................................................... 101
Splitless Injection Technique.................................................................................... 103
S/SL Inlet Parameters ............................................................................................................ 107
Chapter 6
Purged Packed Column Injector (PPKD) .........................................................................................113
PPKD Overview .................................................................................................................... 114
Septa ......................................................................................................................... 116
Liners ........................................................................................................................ 116
PPKD Injection Techniques .................................................................................................. 116
PPKD Injector Menu ............................................................................................................. 116
Chapter 7
Column ...............................................................................................................................................125
Introduction............................................................................................................................ 126
Capillary and Wide-bore Columns ........................................................................................ 126
Using Correct Fittings .............................................................................................. 126
Packed Columns .................................................................................................................... 128
Metric Packed Columns............................................................................................ 128
Imperial Packed Columns......................................................................................... 129
Installation ............................................................................................................................. 132
Keeping Leaks Under Control ............................................................................................... 146
Column Evaluation ................................................................................................... 146
Identifying and Removing Leaks ............................................................................. 146
Expected K Factor .................................................................................................... 150
K Factor Tables ........................................................................................................ 150
Column Conditioning ............................................................................................................ 156
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Packed Columns ............................................................................................ 98
Refocusing the Sample ................................................................................ 105
Flooding....................................................................................................... 106
Column Ferrules .......................................................................................... 126
Using Correct Metric Fittings...................................................................... 128
Using Correct Imperial Fittings................................................................... 129
Helium Carrier Gas Theoretical K Factor ................................................... 151
Nitrogen Carrier Gas Theoretical K Factor ................................................. 152
Hydrogen Carrier Gas Theoretical K Factor ............................................... 153
Instruction Manual