LaMotte SMART3 Soil Operator's Manual page 84

PROCEDURE
1. Press and hold
2. Press
3. Scroll to and select All Tests (or another sequence containing 008 Ammonia-N HR)
4. Scroll to and select 008 Ammonia-N HR from menu.
5. Use the 1 mL pipet (0354) to transfer 2 mL of soil extract into a clean tube (0290).
6. Insert tube into chamber, close lid and select Scan Blank. (See Note)
7.
8. Use the 1.0 mL pipet (0354) to add 1.0 mL of *Ammonia Nitrogen Reagent #2 (V-
9. At end of the 5 minute waiting period, immediately mix, insert tube into chamber,
10. Press
NOTE: It is strongly suggested that a reagent blank be determined to account for any
contribution to the test result by the reagent system. To determine the reagent blank,
follow the above test procedure to scan a distilled or deionized water blank. Then follow
the above procedure to perform the test on a distilled or deionized water sample. This
test result is the reagent blank. Subtract the reagent blank from all subsequent test
results of unknown samples. It is necessary to determine the reagent blank only when a
new lot number of reagents is obtained.
AMMONIA NITROGEN
1.800.544.2843
until colorimeter turns on.
ENTER
to select Testing Menu.
from Testing Menu.
Dilute to the 10 mL line with deionized waer. Mix and neutralize according to the
procedure on page 84.
Remove tube from colorimeter. Add 12 drops of Ammonia Nitrogen Reagent #1 (V-
4797). Cap and mix. Wait 1 minute.
4798). Cap and mix. Allow 5 minutes for maximum color development.
close lid and select Scan Sample. Multiply the result by 50 to determine the
ammonia-nitrogen concentration in lb/acre.
to turn the colorimeter off or press the
or make another menu selection.
Ammonia Nitrogen Concentration Chart
Pounds per Acre
0-24 lb/acre
25-68 lb/acre
Over 71 lb/acre
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15
10 20
5 25
0 30
EXIT exit to a previous menu
Range
Low
Medium
High
Smart3 Soil Test Procedures 9.18
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