LaMotte AM-41 Hydroponics Test Kit - Manual (Page 6)

DI LU TION PRO CE DURE
If the test result in the nitrate, phosphate, potassium, ammonia nitrogen or
sulfate test is greater than the highest comparator value it is necessary to
perform a dilution. Dilutions are made with Deionized Water (5115PT).
Amount of Sample Dilute To Multiply Result By
1.0 mL 2.0 mL 2
1.0 mL 5.0 mL 5
1.0 mL 10.0 mL 10
1.0 mL 20.0 mL 20
1.0 mL 25.0 mL 25
TEST PRO CE DURES
pH
A pH value of 7.0 indicates a neutral solution. Values above 7.0 indicate
alkaline solutions, while values below pH 7.0 indicate acid solutions.
1.
Fill test tube (0230) to 5 mL line with the sample.
2. Add 10 drops of *Hydroculture pH Indicator
(5132). Cap and mix.
3. Insert test tube into the Hydroculture pH
Comparator (5304). Match sample color to a
color standard. Record as pH.
NOTE:
If the pH of the sample is not
between 6.2 and 6.8, it must be adjusted to 6.5
before proceeding with the following tests. If
the pH is below 6.2 add *Sodium Hydroxide,
1.0N (4004WT), one drop at a time,
periodically checking the pH until it is
brought into the range of 6.2 to 6.8. If the pH
is above 6.8, add *Hydrochloric Acid, 1.0N
(6130WT) in the same manner.
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