Test Procedures
CALCULATIONS:
To express results as Unionized Ammonia (NH
3
):
ppm Unionized Ammonia (NH
3
) =
ppm Ammonia-Nitrogen (NH
3
–N) x 1.2
To express results as Ionized Ammonia (NH4):
ppm Ionized Ammonia (NH
4+
) =
ppm Ammonia-Nitrogen (NH
3
–N) x 1.3
NOTES: 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. 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.
To determine the percentage of Ammonia-Nitrogen that is unionized and ionized, consult
the Appendix.
SMART Spectro 2 Test Procedures 05.02.16
AMMONIA-NITROGEN,
Low Range
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