Agilent Technologies 7890 Series User Manual

33
Agilent 7890 Series Gas Chromatograph
Advanced Operation Manual
Agilent Technologies
3
Inlets
Using Hydrogen 35
Inlet Overview 36
Carrier Gas Flow Rates 37
About Gas Saver 38
Pre Run and Prep Run 40
Auto Prep Run 41
About Heaters 42
About the Split/Splitless Inlet 44
Split/Splitless inlet split mode overview 45
Split/Splitless inlet splitless mode overview 46
The S/SL inlet pulsed split and splitless modes 47
Split/Splitless inlet split mode minimum operating pressures 48
Selecting the correct S/SL inlet liner 49
Vapor Volume Calculator 51
Selecting parameters for the S/SL splitless mode 52
About the Multimode Inlet 55
Septum tightening (MMI) 55
Heating the MMI 56
Cooling the MMI 56
MMI split mode minimum operating pressures 57
Selecting the correct MMI liner 58
Vapor Volume Calculator 60
MMI split and pulsed split modes 60
MMI splitless and pulsed splitless modes 64
MMI solvent vent mode 70
MMI Direct Mode 78
To develop a MMI method that uses large volume injection 79
Multiple injections with the MMI 82
About the Cool On-Column Inlet 92
Retention gaps 93
COC inlet temperature control 93
Setting COC inlet flows/pressures 94
About the PTV Inlet 96
PTV sampling heads 96
Heating the PTV inlet 97

Agilent Technologies 7890 Series Specifications

General

Brand	Agilent Technologies
Model	7890 Series
Category	Laboratory Equipment
Language	English