Laboratory Facilities
42 Agilent 5100 and 5110 ICP-OES Site Preparation Guide
Liquid or gaseous argon and nitrogen may be used with Agilent
ICP-OES spectrometer systems. Agilent recommends the use of liquid
gases, which are purer, more convenient and cheaper per unit
volume.
NOTE
Either argon or nitrogen gas may be used as an optics purge gas on the Agilent
ICP-OES systems.
The main gas supply requirement is argon for supply to the plasma,
nebulizer and optics interface purge. Gas is also required to purge
the polychromator assembly, and this may be either argon or
nitrogen. A separate gas line to the polychromator connects
internally to the argon supply unless the optional nitrogen purge kit
is fitted. Gas supply regulator pressure setting may need to be
adjusted to ensure the pressure is in the permissible pressure range
when delivering the gas flow demanded during operation.
The user (or other authorized personnel) must carry out appropriate
leak tests necessary to ensure safety on the gas and liquid
connections that the operator is directed to assemble during
installation, normal use or maintenance.
Table 7. Argon and nitrogen gas specifications
Argon Nitrogen (if nitrogen is used to
purge the polychromator)
Purity 99.996% 99.996%
Oxygen <5 ppm <5 ppm
Nitrogen (argon only) <20 ppm -
Water vapor <4 ppm <4 ppm
Permissible pressure range* 500–600 kPa (73–88 psi)
Recommended pressure* 550 kPa (80 psi) regulated
*When supplying required gas flows
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