LaMotte AST Series Professional Soil Test Outfits - Manual (Page 7)

SAMPLE DILUTION TECHNIQUES
In some tests the sample color may be darker than the darkest color
standard. When this occurs, the original sample must be diluted so an
accurate measurement can be made. Multiply the reading by the
appropriate dilution factor.
EXAMPLE: Measure 5 mL of the sample into a graduated cylinder.
Fill to the 10 mL line with deionized or distilled water. The sample
has been diluted by one-half, and the dilution factor is therefore 2.
Run the test procedure, and multiply the reading by 2 to obtain the
final result.
The following table provides dilution factors for several sample sizes:
Size
Of Sample Distilled Water To Bring
Volume To 10 mL
Multiplication
Factor
10 mL 0 mL 1
5 mL 5 mL 2
2.5 mL 7.5 mL 4
1 mL 9 mL 10
0.5 mL 9.5 mL 20
NOTE: It is important to use pipets and graduated cylinders to make
accurate dilutions.
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