Agilent Technologies 700 Series User Manual page 20

Introduction
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 connects internally to
the argon supply unless the optional nitrogen purge kit is fitted (either factory or
field fitted).
Table 1
Purity
Oxygen
Nitrogen (argon only)
Water vapor
Permissible pressure range
Recommended pressure
Table 2
Standby mode
Operational range (plasma on)
Typical Flows
Measuring wavelengths
> 200 nm (poly boost off)
Measuring wavelengths
< 200 nm (poly boost on)
The spectrometer is fitted with PTFE gas supply hose assemblies, 1.8 meters
(6 feet) in length fitted with Swagelok hardware. Gas supply adapters are included
with each instrument to connect the instrument to regulated gas supplies.
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.
20
Gas requirements
Argon
99.996%
<5 ppm
<20 ppm
<4 ppm
400–600 kPa (57 to 88 psi)
550 kPa (80 psi) regulated
Typical flow rates for the Agilent 700 Series ICP-OES instruments s
Argon (with argon purge gas)
0.75 L/min
9–32.8 L/min
13.5 to 21.75 L/min
15.75 – 24 L/min
Agilent 700 Series ICP Optical Emission Spectrometers User's Guide
Nitrogen
99.996%
<5 ppm
-
<4 ppm
Nitrogen (as purge gas)
Nitrogen flow 0.45 L/min
Argon flow 8.3–29.1 L/min
Nitrogen flow 0.45–2.1 L/min
Argon flow 12.75 – 21 L/min
Nitrogen flow 0.45 L/min
Argon flow 12.75 – 21 L/min
Nitrogen flow 2.1 L/min