Table of Contents
Advertisement
A reagent blank should be run with each set of samples and with each lot of reagents.
The reacted blank will be stable if stored in the dark.
To eliminate error caused by contamination, wash all glassware with 20% sulfuric acid.
For greater accuracy, a minimum of three repetitions should be performed and the
results averaged.
Some samples may be digested completely in less than two hours. The concentration
may be measured at 15 minute intervals while the vials are still hot until the reading
remains unchanged. The vials should be cooled to room temperature before the fi nal
measurement is taken.
COD, Standard Range
COD3 Plus Colorimeter 10.16
Advertisement
Table of Contents
