LaMotte SMART3 Soil Operator's Manual page 93

PROCEDURE
1. Press and hold
2. Press
3. Select All Tests (or another sequence containing 055 Iron Bipyridyl) from Testing
4. Scroll to and select 055 Iron Bipyridyl from menu.
5. Fill a clean tube (0290) to the 10 mL line with the soil extract then neutralize
6. Insert tube into chamber, close lid and select Scan Blank.
7.
8. Use the 0.1 g spoon (0699) to add 0.1 g of *Iron Reagent #2 Powder (V-4451).
9. At the end of 3 minute waiting period, DO NOT MIX. Insert tube into chamber,
10. Press
NOTE: For best possible results, a reagent blank should 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.
IRON
1.800.544.2843
until colorimeter turns on.
ENTER
to select Testing Menu.
Menu.
according to the procedure on page 84.
Remove tube from colorimeter. Use the 0.5 mL pipet (0353) to add one measure of
*Iron Reagent #1 (V-4450). Cap and mix.
Cap and shake vigorously for 30 seconds. Wait three minutes for maximum color
development.
close lid and select Scan Sample. Multiply results by 5 to determine the iron
concentration in ppm.
to turn colorimeter off or press
make another menu selection.
Iron Concentration Chart
Parts Per Million
0.0-1.3 ppm
1.4-3.0 ppm
3.0-5.0 ppm
5.0-10.0 ppm
Over 10.0 ppm
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15
10 20
5 25
0 30
EXIT to exit to a previous menu or
Range
Very Low
Low
Medium
Medium High
High
Smart3 Soil Test Procedures 9.18
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