Marin-5 Operator's Manual - CETAC Technologies

ICP-AES Optimization
It is necessary to optimize the ICP-AES instrument after installation of
the Marin-5. Optimization procedures may include adjustment of gas
flows, plasma viewing positions, and other ICP-AES 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-AES/Marin-5 Optimization Procedure. After the system has been
optimized, the Marin-5 is ready for routine operation.
ICP-AES/Marin-5 Optimization Procedure
1 After the Marin-5 and the ICP-AES have reached a stable
operating temperature, set the nebulizer flow rate to 0.65 L/min
and aspirate an appropriate tuning solution which may include
the element manganese (Mn).
2 Monitor elemental signal intensity of the selected tuning
element in time resolved mode and adjust the argon nebulizer
gas flow to produce the desired highest intensity. The nebulizer
gas flow is one of the most important parameters in determining
sensitivity and stability. Optimize the nebulizer gas flow to
maximize signal and provide a signal stability of 1% RSD or less;
suggested signal integration time is 5 or 10 seconds.
3 Adjust the Marin-5 heater temperature for best signal and
stability. Usually the temperature is adjusted ±10°C from the
preset factory temperature.
ICP-MS Operation
1 Ignite the plasma as instructed in the ICP-MS operating
manual.
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