Gas And Reagent Purity - Agilent Technologies ALS Handbuch

7820 MSD 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 57
Carrier and reagent gas
requirements
Helium (carrier)
Hydrogen (carrier)
Nitrogen (carrier)
Nitrogen (drying gas, nebulizer
pressure)
* Purity specification is the minimum acceptable purity. Major contaminants can be water, oxygen,
When using hydrogen (H
WA R N I N G
gas can flow into the GC and create an explosion hazard. Therefore, be sure that the
supply is turned off until all connections are made and ensure the inlet and detector
column fittings are either connected to a column or capped at all times when
hydrogen gas is supplied to the instrument.
Hydrogen is flammable. Leaks, when confined in an enclosed space, may create a
fire or explosion hazard. In any application using hydrogen, leak test all
connections, lines, and valves before operating the instrument. Always turn off the
hydrogen supply at its source before working on the instrument.
Please refer to the Hydrogen Safety Guide shipped with your instrument.
120
57. Air needs to be zero grade or better. Agilent also recommends using
Carrier and reagent gas purity
*
or air. Drying gas and nebulizer pressure gas can be supplied by a nitrogen gas generator, house
nitrogen system, or liquid nitrogen dewar.
Purity
99.9995%
99.9995%
99.9995%
99.999%
) as the carrier gas or fuel gas, be aware that hydrogen
2
GC, GC/MS, and ALS Site Preparation Guide
Notes
Hydrocarbon free
SFC grade
Research grade