30
SECTION 2, continued
Figure 6 Sample Filtering
After dilution and measurement, calculate the actual result as follows:
1. Calculate the dilution factor:
Where total volume = sample + dilution water
Example: 20 mL of sample + 80 mL of dilution water = 100 mL total
2. Calculate the Final Turbidity Value:
For example, if the measured turbidity value is 1100 NTU, the final turbidity value is
calculated as:
Dilution Factor
Total Volume
Sample Volume
------------------------------------------=
Dilution Factor
100
20
---------- 5= =
Measured Results Dilution Factor× Actual NTU=
1100 5× 5500=
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