Hanna Instruments HI 83215-2008 Series - Manual (Page 19)

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SAMPLE PREPARATION
SAMPLE PREPARATION PROCEDURE
Note: If the water sample to be analyzed is very turbid, let it stand in a beaker for a while until most
of the solid particles have settled. Then, use the pipette to transfer the supernatant solution to the
other beaker and prepare the samples as described below. To prevent the displacement of the settled
solids at the bottom of the beaker, do not induce air bubbles into the solution.
IRRIGATION WATER (LR):
• Measure 100 mL of sample with the graduated cylinder.
• If the solution contains some turbidity or color, pour it in the large 170 mL beaker and add a powder
packet of active carbon.
• Mix well using the spoon and then wait for 5 minutes.