Operation
84 Agilent 55B AA Spectrometer User’s Guide
Set the uptake rate for organic solvents
The fueling effect of organic solvents require careful adjustment of the nebulizer
uptake rate for all analyses that use organic solutions.
Set the uptake rate as follows, using an air-acetylene flame and the selected solvent:
1 Light the flame and adjust the acetylene flow to give a very lean flame.
2 Set the nebulizer for zero uptake as described in the previous section.
3 Slowly rotate the thimble clockwise until the flame is beginning to turn fuel-
rich. Some yellow may be seen.
4 Tighten the locking ring against the nebulizer block to prevent movement of
the thimble during normal operation.
5 Measure and record the uptake rate.
This should be between 3 and 6.5 mL/min.
The nebulizer is now ready for use. If you have just installed the nebulizer, you
should carry out the performance checks described in the next section.
Flame types
The appearance of the flame changes dependent on the fuel/oxidant mix. Typical
flames are shown below:
Figure 38. Air/Acetylene flames. Left to right – Lean, Stoichiometric, Rich
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