LaMotte SMART Spectro Spectrophotometer - Manual (Page 65)

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
1 Aluminum).
4. Scroll to and select 1 Aluminum from menu.
5. Rinse a clean Spectro tube (0290) with sample water. Fill to the 10 mL line with
sample.
6. Insert tube into Spectro chamber and select SCAN BLANK.
7. Rinse a clean test tube (0230) with sample water. Fill to the 5 mL line with
sample.
8. Remove tube from Spectro. Empty sample from Spectro tube (0290).
9. Add 5 mL sample from test tube (0230) to empty Spectro tube (0290).
10. Use the 0.05 g spoon (0696) to add one measure of *Aluminum Inhibitor
Reagent (7865). Cap and mix to dissolve powder.
11. Use a 1.0 mL pipet (0354) to add 2 mL of *Aluminum Buffer Reagent (7866).
Cap and mix.
12. Use a second 1.0 mL pipet (0354) to add 1 mL of Aluminum Indicator
Reagent (7867). Cap and mix contents. Wait 5 minutes for maximum color
development.
13. At end of 5 minute waiting period, mix, insert tube into chamber, close lid and
select SCAN SAMPLE. Record result.
14. Press OFF button to turn the spectrophotometer off or press EXIT button to
exit to a previous menu or make another menu selection.
NOTE: For the 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. Add 5 drops of Aluminum Complexing Reagent (7868). 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.
ALUMINUM SMART Spectro Test Procedures 2.11
Test P
rocedures