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11 If necessary, repeat some or all of the previous steps until the
Soaking the burner in nitric acid and the use of the ultrasonic bath effectively
NOTE
removes soft chemical deposits inside the slot. The removal of hard carbon
deposits usually requires more significant physical effort.
If the width of the slot exceeds 0.47 mm (0.0185") for a nitrous-
oxide/acetylene burner or 0.54 mm (0.021") for an air/acetylene
burner, the burner cannot be refurbished and must be relaced with a
new one.
Nebulizer
This section describes how to remove, disassemble, clean and
reassemble your nebulizer.
Routine maintenance
Agilent 55B AA Spectrometer User's Guide
burner slot is clean.
Clean the nebulizer/spraychamber assembly thoroughly at the
end of every working day by aspirating at least 50 mL of the
appropriate solvent through the system.
Regularly (daily) test all connections for leaks with a brush and
soap solution or a proprietary leak-detecting solution. Never use
a naked flame when testing for leaks. Rectify all leaks before
lighting the flame. Test the nebulizer for leaks. If any leakage is
detected, replace the internal O-rings.
Regularly (daily) check the uptake tubing for blockage, both at
the solution end and where it is joined to the nebulizer capillary.
Regularly (monthly) remove and check the nebulizer as described
below, then re-install the nebulizer (as described in Chapter 3)
and measure the uptake rate (as described in Chapter 5).
Maintenance
99
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