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SAMPLE PREPARATION
SAMPLE PREPARATION PROCEDURE
The following Sample Preparation Procedure applies in case of:
• Samples with color or suspended matter (turbidity).
• Concentrated samples, for which the analysis result is over the range of the parameter.
Use the accessories contained in the Sample Preparation Kit to prepare the sample according to the
following instructions.
COLORED OR TURBID SAMPLES:
Colored or suspended matter in large amounts may cause interference. They should be removed by
treatment with active carbon and filtration.
• If the water sample contains suspended matter, let it stand in a beaker until most of the solid particles
have settled. Then, use the pipette to transfer the supernatant solution to the other beaker. To prevent
the displacement of the settled solids at the bottom of the beaker, do not induce air bubbles into the
solution.
• Measure 100 mL of sample with the graduated cylinder.
• If the solution still 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.
• Fold a filter disc twice as shown in the figure. Separate
one side from the other three to form a cone. Insert the
folded filter disc in the funnel.