LaMotte SMART3 Soil Operator's Manual page 108

PROCEDURE
1. Press and hold
2. Press
3. Select All Tests (or another sequence containing 089 Sulfate HR) from Testing
4. Scroll to and select 089 Sulfate HR from menu.
5. Use the 1 mL pipet (0354) to add 1 mL of *Sulfate Extracting Solution (6363) to
6. Add 3 one gram measures of soil using the 1 g spoon (0697). Cap vial and shake for
7.
8. Fill a clean tube (0290) to the 10 mL line with the soil extract.
9. Insert tube into chamber, close lid and select Scan Blank.
10. Remove tube from colorimeter. Use the 0.1 g spoon (0699) to add one measure
11. Mix tube again. Insert tube into chamber, close lid and select Scan Sample. Multiply
12. Press
NOTE: If the sulfate concentration of the test sample is greater than 100 ppm, it is
recommended that a dilution be made with deionized water and the results multiplied
by the dilution factor.
A white fi lm is deposited on the inside of test tubes as a result of the sulfate test.
Thoroughly clean and rinse test tubes after each test.
For the most accurate results, samples and reactions should be at 25±4°C.
SULFUR
1.800.544.2843
until colorimeter turns on.
ENTER
to select Testing Menu.
Menu.
the test tube (0701) then add deionized water to the 15 mL line.
fi ve minutes.
Filter and collect all of the soil fi ltrate using the funnel (0459) and fi lter paper
(0463). If the fi ltrate is not clear, fi lter a second time.
of *Sulfate Reagent (V-6277). Cap and shake until powder dissolves. A white
precipitate will develop if sulfates are present. Wait 5 minutes.
the results by 1.65 to determine the sulfur concentration in ppm.
to turn colorimeter off or press
make another menu selection.
Sulfur Concentration Chart
Parts Per Million
0-16 ppm
17-30 ppm
31-50 ppm
52-75 ppm
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15
10 20
5 25
0 30
EXIT to exit to a previous menu or
Range
Low
Medium Low
Medium
High
Smart3 Soil Test Procedures 9.18
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