Maintenance
Agilent 55B AA Spectrometer User’s Guide 119
NOTE
Soaking the burner in nitric acid and using an ultrasonic bath effectively removes
soft chemical deposits inside the slot. The removal of hard carbon deposits
requires more significant physical effort.
6 Prepare a bath of 5% v/v nitric acid solution in a container that is designed to
hold an inverted burner.
7 Submerge only the slotted part of the burner in acid.
Figure 80. Burner slot soaking in acid
8 Leave to stand overnight to soften the deposits.
9 Rinse with distilled water and place the inverted burner in an ultrasonic bath
containing dilute laboratory detergent for approximately 10 minutes.
10 Rinse with distilled water and allow to dry.
To speed up drying, dry the burner with a paper or lint-free towel, and then use
compressed oil-free air or inert gas.
NOTE
In the following the steps, ensure the card does not tear or disintegrate. This may
clog the burner slot causing uneven atomization at the flame, affecting sensitivity.
Use several cleaning cards if necessary.
CAUTION
Never slide the card sideways within the burner slot.
11 Insert a clean Agilent burner cleaning and alignment card into the burner slot.
12 Use a dropper to pour a small amount of metal polishing fluid on each side of
the burner cleaning card just above the burner slot.
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