LaMotte SMART 3 Electronic Soil Lab - Manual (Page 84)

84 SMART3 Soil 1.11
PROCEDURE
Press and hold 1. until colorimeter turns on.
Press 2. ENTER to select TESTING MENU.
Select 3. ALL TESTS (or another sequence containing 089 Sulfate HR) from
TESTING MENU.
Scroll to and select
4. 089 Sulfate HR from menu.
Use the 1 mL pipet (0354) to add 1 mL of *Sulfate Extracting Solution (6363) 5.
to the test tube (0701) then add deionized water to the 15 mL line.
Add 3 one gram measures of soil using the 1 g spoon (0697). Cap vial and
6.
shake for five minutes.
Filter and collect all of the soil filtrate using the funnel (0459) and filter paper
7.
(0463). If the filtrate is not clear, filter a second time.
Fill a clean tube (0290) to the 10 mL line with the soil extract.
8.
Insert tube into chamber, close lid and select SCAN BLANK.. 9.
Remove tube from colorimeter. Use the 0.1 g spoon (0699) to add one 10.
measure of *Sulfate Reagent (V-6277). Cap and shake until powder
dissolves. A white precipitate will develop if sulfates are present. Wait 5
minutes.
Mix tube again. Insert tube into chamber, close lid and select SCAN
11.
SAMPLE. Multiply the result by 1.65 to determine the sulfur concentration in
ppm.
Press
12. to turn colorimeter off or press
EXIT
to exit to a previous menu
or make another menu selection.
SULFUR CONCENTRATION CHART
PARTS PER MILLION RANGE
0-16 ppm Low
17-30 ppm Medium Low
31-50 ppm Medium
52-75 ppm High
Test P
rocedures