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Safety Practices and Hazards
Liquid Trap
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.
The liquid trap interlock is incorporated to minimize the possibility
of attempting to operate the instrument with an empty trap or with
the drain tube missing. 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.
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.
A length of tubing must be connected to the drain outlet on the trap
and led to a suitable waste vessel. The free end of the tubing 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 length of tubing 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 tubing 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.
Heat Hazards
An open flame, burners and other hot surfaces can present heat
hazards that can result in severe burns.
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Agilent 240/280 Series AA User's Guide
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