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
66 Nitrate-TesTab
) from
TESTING MENU
.
4. Scroll to and select
66 Nitrate-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 *Nitrate Spectrophotometric Grade Tablet (3881A).
9. Use Tablet Crusher (0175) to crush tablet.
10. Cap tube.
11. Invert tube 60 times per minute for 2 minutes. (One inversion equals 180°).
12. Wait 5 minutes. Do NOT mix.
13. Insert tube into chamber, close lid and select
SCAN SAMPLE
. Record result in ppm
nitrate.
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 nitrate (NO
3
) results to nitrate-nitrogen (NO
3
-N), divide by 4.4.
SMART Spectro 2 Test Procedures 05.02.16
NITRATE
, TABLET
www.
GlobalScientificSupply
.com
GLOBAL SCIENTIFIC SUPPLY
The Laboratory Supply Company!