25
SAMPLE DILUTION TECHNIQUES
If a test result is out of the range of the meter, it must be diluted. The test
should then be repeated on the diluted sample. The following table gives quick
reference guidelines for dilutions of various proportions.
Amount of Sample
Deionized Water to Bring
Final 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
All dilutions are based on a fi nal volume of 10 mL, so several dilutions will
require small volumes of the water sample. Graduated pipets should be
used for all dilutions. If volumetric glassware is not available, dilutions can
be made with the colorimeter tube. Fill the tube to the 10 mL line with the
sample and then transfer it to another container. Add 10 mL volumes of
deionized water to the container and mix. Transfer 10 mL of the diluted
sample to the colorimeter tube and follow the test procedure. Repeat the
dilution and testing procedures until the result falls within the range of the
calibration. Multiply the test result by the dilution factor. For example, if 10 mL
of the sample water is diluted with three 10 mL volumes of deionized water,
the dilution factor is four. The test result of the diluted sample should be
multiplied by four.
GENERAL INFORMATION
PACKAGING AND DELIVERY
Experienced packaging personnel at LaMotte Company assure adequate
protection against normal hazards encountered in transportation of
shipments.
After the product leaves LaMotte Company, all responsibility for safe delivery
is assured by the transportation company. Damage claims must be fi led
immediately with the transportation company to receive compensation for
damaged goods.
GENERAL PRECAUTIONS
READ THE INSTRUCTION MANUAL BEFORE ATTEMPTING TO SET UP OR
OPERATE THE METER.
Failure to do so could result in personal injury or
damage to the meter. The meter should not be used or stored in a wet or
corrosive environment. Care should be taken to prevent water from wet tubes
from entering the meter chamber.
NEVER PUT WET TUBES IN THE METER.
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