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• Remove the cap and fill the Demineralizer Bottle with tap
water.
• Replace the cap and shake gently for at least 2 minutes.
• Open the upper part of the Demineralizer Bottle cap and gently squirt
the demineralized water into the cylinder, up to the 100 mL mark.
Note: The ion exchange resin contained in the Demineralizer Bottle is
provided with an indicator substance. The indicator will change from
green to blue when the resin has been exhausted and needs to be
replaced.
• Pour the solution in the large 170mL beaker, replace the cap and
invert several times to mix.
• If the solution contains some turbidity or color, add a powder packet of active
carbon and follow the procedure described for
Irrigation Water (LR)
.
NUTRIENTS SOLUTION (HR):
• Add 10 mL of sample to the graduated cylinder using the 5 mL syringe
(twice).
• Mix well using the spoon and then wait for 5 minutes.
• Unscrew the filter assembly, put a filter disc inside and close
it.
• Connect the filter assembly to the 60 mL syringe by the
screw rim.
• Remove the syringe plunger and fill the syringe with the
sample to be filtered. Pour the sample gently, trying to
avoid transferring of the actived carbon to the syringe.
• Reinsert the plunger and filter the solution into the 100mL
beaker by pushing gently the syringe plunger.
The sample is now ready.
Note: Filter at least 40 mL of solution if all the four methods
will be tested. If the solution is still turbid or colored, treat it
again with a packet of active carbon. After use, throw the
filter disc away and wash the syringe and the filter assembly
well. Always use a new disc for another sample.
NUTRIENTS SOLUTION (MR):
• Use the graduated cylinder to measure exactly 20 mL of
sample.
filter
disc
