LaMotte COD Plus Colorimeter 1922-EX2 - Manual (Page 133)

FOR EXAMPLE:
If a fresh water sample at 20
°C has a pH of 8.5 and the test result is 1.0 ppm as
Total Ammonia-Nitrogen:
1.
The percentage from the table is 11.18% (or 0.1118).
2. 1 ppm Total Ammonia-Nitrogen x 0.1118 = 0.1118 ppm Unionized
Ammonia-Nitrogen.
3. Total Ammonia-Nitrogen 1.0000 ppm
Unionized Ammonia-Nitrogen
-
0.1118 ppm
Ionized Ammonia-Nitrogen
=
0.8882 ppm
APPENDIX 2/2 COD PLUS TEST PROCEDURES 6/02