LaMotte SMART Spectro Spectrophotometer - Manual (Page 245)

PROCEDURE
Use universal sample holder.
1. Press and hold ON button until spectrophotometer turns on.
2. Scroll to and select PROGRAMMED TESTS.
3. Scroll to and select ALL TESTS (or another sequence containing
89 SULFATE-HR) from TESTING MENU.
4. Scroll to and select 89 SULFATE-HR from menu.
5. Rinse a clean tube (0290) with sample water. Fill to the 10 mL line with
sample.
6. Insert tube into chamber, close lid and select SCAN BLANK.
7. Remove tube from Spectro. Use the 0.1 g spoon (0699) to add one measure
of *Sulfate Reagent (V-6277). Cap and shake until powder dissolves. A white
precipitate will develop if sulfates are present. Wait 5 minutes.
8. Mix tube again. Insert tube into chamber, close lid and select SCAN SAMPLE.
Record result.
9. Press OFF button to turn spectrophotometer off or press EXIT button to exit to
a previous menu or make another menu selection.
NOTES: 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.
SULFATE SMART Spectro Test Procedures 2.11
Test P
rocedures