Maintenance and care
52
Edition 05/2014
PlasmaQuant PQ 9000
13. Screw in the stopper into the gas connection.
Attention!
The upper edge of the stopper must be flush
with the upper edge of the holder.
Do not screw in any further under any
circumstances.
14. Insert the pressure ring into the holder and
firmly screw the clamp screw into the holder as
far as it will go.
To ensure gas tightness in the lower part of the
torch, the gap between the clamp screw and
the holder must not exceed 0.5 mm in width.
15. Install the torch and bonnet according to the section "Installation of the torch, nebulizer
with spray chamber and sample supply" p. 34.
8.2.4
Cleaning the nebulizer
The nebulizer must be cleaned if particles or high concentrations of salt in the samples have
clogged it up. An indicator that the nebulizer has clogged up is increased carrier gas pressure:
1. Use
to open the P
LASMA
/
C
ONTROL
window.
2. Compare the current percentage (pressure) of the C
ARRIER GAS
parameter with the value
achieved after installation of the new or cleaned nebulizer.
3. Clean the nebulizer as described below if the percentage has increased significantly (by
more than half the original value), at the latest however if 75% is reached.
Wash the nebulizer using the nebulizer cleaning tool. This tool can be ordered from Analytik
Jena AG.
1
Nebulizer
2
Nebulizer holder
3
1st red O-ring
4
Syringe
Figure 20
Nebulizer cleaning tool with installed nebulizer
1. Unscrew the nebulizer holder from the syringe and fill the syringe with methanol. Pull the
plunger out to the first red O-ring.
2. Screw the nebulizer holder on the syringe.
3. Push the nebulizer with the tip first into the holder until the lateral carrier gas connection
comes to rest in the holder groove.
