How much results of HACK kits can be different from the results that be obtained by titrimetrically method?

01 June 2023 0 1K Report

Hi, I compared the results of COD analysis by kits (Hack) and the results from the titration method on same substrate. Unfortunately, the results of kits were almost double respect to the titration method. Is there a difference between these two tests?

This difference was also seen in the concentration of ammonium, total nitrogen and total phosphate, but it was very small. The only thing I must add is that I used drinking water due to the lack of access to deionized water.

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