Safety Practices and Hazards
26 Agilent 55B AA Spectrometer User’s Guide
Liquid trap
WARNING
Explosion Hazard, Fire Hazard, Noxious Gas
Improper use of the liquid trap can create explosion hazards, fire hazards, and
toxic vapor hazards which can result in death or serious personal injury.
Never use a solution or solvent having a specific gravity lower than 0.75,
otherwise the liquid seal
can be breached. This can create a flashback and create
an explosion hazard or a fire hazard.
The liquid trap interlock is incorporated to minimize the possibility of attempting to
operate the instrument with an empty trap. Never interfere with this interlock.
Never attempt to bypass this interlock.
Always fill the liquid trap with the same solvent that is being used for your
samples.
The trap is designed to provide a liquid seal under all normal conditions with
solutions having a specific gravity greater than 0.75.
A drainage tube must be connected to the drain outlet (the lower nipple) on the
liquid trap and led to a suitable waste vessel. The free end of the tube must remain
above the liquid in the waste vessel. Do not use glass waste vessels—use vessels
made of a material that will not shatter in the event of a flashback.
A venting tube should be connected to the vapor vent (the upper nipple) on the
liquid trap when you are analyzing organic or toxic liquids. This tubing should be
led out from the sample compartment, parallel to the drain tubing, and MUST
slope downwards to enable any liquid overflow to drain out and prevent the tubing
from becoming blocked. Do NOT lead the vapor tube to the waste vessel. If
necessary, an active exhaust system should be used to draw away toxic vapors. If
you are not analyzing solutions of a toxic nature, leave the vapor outlet uncovered.
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