Gas And Reagent Purity - Agilent Technologies ALS Handbuch

6850 Series GC Site Preparation

Gas and Reagent Purity

Agilent recommends that carrier and detector gases be 99.9995% pure. See
Table
high quality traps to remove hydrocarbons, water, and oxygen.
Table 39
Carrier and reagent gas
requirements
Helium (carrier)
Hydrogen (carrier)
Nitrogen (drying gas, nebulizer
pressure)
Methane reagent gas
Isobutane reagent gas
Ammonia reagent gas
Carbon dioxide reagent gas
1 Purity specification is the minimum acceptable purity. Major contaminants can be water, oxygen,
2 Required reagent gas for installation and performance verification, external CI MS only. The 5975
3 Optional reagent gases, CI mode only.
84
39. Air needs to be zero grade or better. Agilent also recommends using
Carrier and reagent gas purity
1
2
3
3
3
or air. Drying gas and nebulizer pressure gas can be supplied by a nitrogen gas generator, house
nitrogen system, or liquid nitrogen dewar.
and 5977 operate in an external CI mode..
Purity
99.9995%
99.9995%
99.999%
99.999%
99.99%
99.9995%
99.995%
GC, GC/MS, and ALS Site Preparation Guide
Notes
Hydrocarbon free
SFC grade
Research grade
Research or SFC grade
Instrument grade
Research or SFC grade
SFC grade