LaMotte COD Plus Colorimeter 1922-EX2 - Manual (Page 67)

NOTES:
l Reagents are light sensitive. Unused reagents should be stored in the
shipping container, and in the refrigerator if possible, until needed.
l A reagent blank should be run with each set of samples and with each lot
of reagents.
l
The reacted blank will be stable if stored in the dark.
l To eliminate error caused by contamination, wash all glassware with 20%
sulfuric acid.
l For greater accuracy, a minimum of three repetirions should be performed
and the results averaged..
COD - HIGH RANGE 4/4 COD PLUS TEST PROCEDURES 2/04