Gas Requirements

What should you consider when it comes to selecting gases for your new GC or GC/MS system? 

• Which gases will you be using?  

• Did you confirm that gases available are a supported configuration for installation?
  • Gas requirements are specified in Site Preparation Checklists and Guides.  This information is also included in the free Agilent Education Course: GC-0GEN-1001e - Gas Management Best Practices?     

• What is the purity of the gases required at the instrument?
  • GC all gases 99.9995%
  • SQ GC/MS 99.9995% He at <=120 psi
  • TQ GC/MS 99.9995% He at <=120 psi
  • TQ GC/MS 99.9995% N2 at <=120 psi
  • CI: Methane 99.999% <=25 psi
  • JetClean: H2 99.9995% <= 25 psi (a regulator is not included to go down from FID H2 to JetClean H2)

• What is the source (tanks, generators, house plumbing) of the gases?  For example, will it take additional time for gas lines to purge?
  • Will you be connecting into existing plumbing?
  • What should the terminal connection be before the installer arrives?
  • All gases should have 1/8” Swagelok terminal fittings.

• Will the installer have easy access to the gas supply?  

• How far away will the gas cylinders be?  

• Have you purchased the necessary tubing, fittings, valves, traps, etc.? Refer to the  Essential Chromatography and Spectroscopy Catalog Series for part information.