Procedure For Dilution Factor: 5 - Hanna Instruments HI83325 Instruction Manual

8.3. PROCEDURE FOR DILUTION FACTOR: 5

Note: For a more accurate dilution, use laboratory-grade glass pipettes and volumetric flasks.
• Use the graduate cylinder to measure exactly 20 mL of sample.
• 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 170 mL beaker,
replace the cap and invert several times to mix.
• If the solution contains some turbidity or color, follow the procedure described in the REMOVING
TURBIDITY AND COLOR section.
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