Trace2O AquaSafe WSL25 Plus, Instruction Manual

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SECTION 5: USE OF BACTERIOLOGICAL MEDIA
If stored correctly, the dissolved media should remain stable for 6-8 weeks. However, if there
are any signs of contamination e.g. yellowing, cloudiness etc., discard.
Ideally, to reduce the possibility of contamination, use one bottle of media only for a 24 hour
period, and use a fresh bottle on each subsequent day. However,
if this is not possible, then
the bottle must be resealed immediately after use. The media may be re-sterilised if required
by boiling in a water bath for 15 minutes.
Clean empty media bottles thoroughly before re-use. Any residues should be washed out with
hot water; cleaned with a little detergent (a small brush can be used if required); rinsed
several times in clean water, dried and stored in a clean environment, with the lids lightly
attached.
The MLSB solution may be applied to the pads up to 6 hours before sampling, if the pads are
subsequently stored in a cool environment. This procedure can reduce the potential for
contamination with excessive operations in the field.
If the MLSB powder is stored in the original sachets in dry, cool conditions it should have a
shelf life of up to 5 years from the date of manufacture.