4
SAMPLING HEAD PREPARATION
Cleaning the Sampling Head
All cleaning, loading, and unloading should be conducted in a controlled
environment to minimize any chance of potential contamination. When new
or when using the sampler at a di
ff
erent location, all sample contact areas need
to be cleaned. Rinse with appropriate organic solvent. Allow the solvent to
evaporate before loading a cartridge.
For deployed applications where method-speci
fi
ed solvents are
unavailable, use isopropyl (rubbing) alcohol or a clean tissue wipe.
Do not place any mechanical object in the inlet nozzles.
O-ring Care for the Sampling Head
Visually inspect the condition of the BUNA-N exhaust O-ring.
See Figure 2
.
Ensure the O-ring surface is smooth (i.e., without cracks, cuts, or other damage).
Ensure the O-ring is
fi
tt
ed properly in its channel. Replace the exhaust O-ring
if there is apparent damage, stretching, or thinning. It is recommended that the
PTFE inlet O-ring be replaced by the manufacturer only.
