CETAC Aridus II, Руководство оператора

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Aridus II™ Operator’s Manual
24
10mL/min. Note that a nitrogen flow of 10mL/min will read as “010” on the
flow meter. Allow both gas flows to purge the Aridus II
™
for five minutes.
NOTE:
All temperature controllers are factory programmed and preset. Do not exceed
controller settings of 160°C for the desolvation system and 110°C for the spray
chamber. If a different temperature setting is desired, the user must contact
CETAC Customer Service. Unauthorized changes in the temperature settings
will immediately terminate the warranty.
ICP-MS Operation
1
Set the SWEEP GAS flow to 0.5 L/min and the NITROGEN gas flow to zero by
adjusting the gas flow control knobs located on the front of the Aridus II
™
.
NOTE:
It may be possible to ignite the plasma while the SWEEP GAS and NITROGEN
GAS are flowing. However, it is recommended that the gas flows be turned
down during plasma ignition.
2
Ignite the plasma as instructed in the ICP-MS operating manual.
3
After the plasma has stabilized, slowly increase the SWEEP GAS control to a
setting of approximately 3.0 L/min. NITROGEN flow should remain at the zero
setting.
4
Prepare and aspirate an appropriate tuning solution for the ICP-MS
instrument.
System Optimization
It is necessary to optimize the ICP-MS instrument after installation of the
Aridus II
™
. Optimization procedures may include adjustment of gas flows,
plasma viewing or sampling positions, ion lens settings, and other ICP-MS
parameters. Typically, the signal-to-noise or signal to-background ratio is the
primary criterion for optimization. For detailed instructions on system
optimization for aqueous or organic samples, perform the ICP-MS/Aridus II
™
Optimization Procedures. After the system has been optimized, the Aridus II
™
is ready for routine operation.
Aridus II
™
Optimization Procedure
1
After the Aridus II
™
and ICP-MS have reached a stable operating temperature,
set the nebulizer flow rate to 0.9 L/min and aspirate an appropriate tuning
solution which includes the element cerium (Ce).