Test Procedures
PROCEDURE
Use universal sample holder
1. Press
ON
button to turn spectrophotometer on.
2. Scroll to and select
PROGRAMMED TESTS
.
3. Scroll to and select
ALL TESTS
(or another sequence containing
69 Nitrite-TesTab
) from
TESTING MENU
.
4. Scroll to and select
69 Nitrite-TesTab
from menu .
5. Rinse a tube (0290) with sample water. Fill to 10 mL with sample.
6. Insert the tube into chamber, close lid and select
SCAN BLANK
.
7.
Remove the tube from Spectro.
8. Add one *Nitrite Spectrophotometric Grade Tablet (3886A).
9. Use Tablet Crusher (0175) to crush tablet.
10. Cap tube.
11. Shake vigorously for 20 seconds.
12. Wait 2 minutes.
13. Insert tube into chamber, close lid and select
SCAN SAMPLE
. Record result in ppm
nitrite.
14. Press and hold
OFF
button to turn the spectrophotometer off or press
EXIT
button to
exit to a previous menu or make another menu selection.
NOTES: 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.
To convert nitrite (NO
2
) results to nitrite-nitrogen (NO
2
–N), divide results by 3.3.
NITRITE
SMART Spectro 2 Test Procedures 05.02.16
www.
GlobalScientificSupply
.com
GLOBAL SCIENTIFIC SUPPLY
The Laboratory Supply Company!
