Thermo Scientific iCAP 6000 Series Maintenance Manual page 37

iCAP Customer Training Manual
Tip:
Rinse the nebuliser. It is very important to rinse the nebuliser before
o
turning the gas off. It is advisable to rinse the nebuliser periodically throughout
the sequence (depending on the chemistry of your samples).
Solids may be deposited in the nozzle as sample solvent evaporates, further
o
constricting the flow passages and reducing the signal. Rinsing will minimise or
eliminate these deposits.
Gas flow through most nebuliser models creates a venturi suction at the capillary
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tip which can be used to draw rinse liquid through the capillary.
After the testing of any salt solution, promptly rinse the system with a chemically
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compatible rinse consisting only of volatiles (this is especially necessary in flow
injection analysis systems).
A low-pH (acidic) sample should be followed by a low-pH rinse, a high-pH
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sample by a high-pH rinse and an organic sample by an appropriate solvent.
The final rinse should use deionised water and/or isopropyl alcohol
Note: Allow the nebuliser to dry before turning off the gas and make
sure that the liquid feed is disconnected or arranged so that siphoning into
the nebuliser while the gas is off cannot occur.
DO NOT use ultrasonic cleaning to remove particulate matter as
sympathetic vibrations may be set up in the capillary causing it to
bounce against the inside of the nozzle and chip, Nebuliser
performance can decline as a result.
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