Hanna-instruments HI 83225 Manuale Utente Scaricare il pdf (Pagina 20)

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.

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Hanna-instruments HI 83225 Manuale Utente Pagina 20