DelAgua OXFAM-DELAGUA, User Manual

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OXFAM-DELAGUA Water Testing Kit — Users Manual
37
7. Using the sterile tweezers, carefully
remove a sterile membrane filter from
the packet.
Hold the membrane only by the edge
and do not let the membrane filter
touch anything while it is being
transferred to the filtration apparatus.
8. With one hand, lift the filtration funnel
and plastic collar above the filtration
base. With the tweezers in your other
hand, place the membrane filter (grid
side facing upwards) onto the bronze
disc filter support. Replace the filter
funnel and collar immediately, without
allowing them to come into contact
with any external objects. Hold the
funnel between the thumb and
forefinger to ensure that the collar will
not slip off and that the fingers do not
come into contact with the interior
surface of the funnel.
9. Screw the plastic collar down tightly
to provide a water tight seal between
the filter membrane and the filter
funnel.
Remove membrane from packet
Place the membrane onto the filter support
Fit the filter funnel and plastic collar