Operation
80 Agilent 55B AA Spectrometer User’s Guide
WARNING
Explosion Hazard
Operation of a flame with an incomplete safety system can result in a violent
explosion that can cause death, injury, hearing loss or property damage.
To prevent unsafe operation, ignition of the flame is prevented unless all
safety interlocks are satisfied. If the igniter fails to operate, and all safety
interlocks are satisfied, call an Agilent trained and certified engineer to find
and fix the fault.
Never use an external igniter to light the flame as this will bypass the inherent
self-checking of the safety system.
2 Check the gas regulator settings and readjust if necessary.
3 When the flame has stabilized, optimize the flame conditions.
4 Aspirate 50 mL of the solution. If not a solution, aspirate 50 mL of the
appropriate solvent.
Optimize the flame signal
To optimize the flame signal:
1 Press the Optimize key and select the ‘Signal’ option.
2 Aspirate the blank and press the Alt and Read keys together to perform an
Instrument Zero.
3 Aspirate a standard solution that will give an absorbance of at least 0.2. If you
are in emission mode, aspirate the bulk standard or the highest concentration
standard.
Watch the signal bar and adjust the burner height using the outer knob on the
burner adjuster to obtain the maximum absorbance.
Ensure the burner is below the light path.
Alternate between aspirating the blank and the top standard, making a note of
the net absorbance value. When this value stops increasing the burner height
is correct.
The burner height controls the sensitivity and will also influence atomization
interferences.
4 Carefully move the burner horizontally by turning the inner adjustment knob on
the burner adjuster. Watch the signal bar to obtain maximum absorbance. In
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