Correct COD Detemination
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For the determination of COD values, the photometric determination with cuvette tests is much easier compared to titration and should be preferred regarding the quantity of necessary reagents. This is why the cuvette tests for self-monitoring have been approved as ISO compliant with the ISO 15705.
You should take the following factors for the precise determination of the COD value into consideration, so that the results can withstand the inspection by the authorities. Read our PDF.
This article is supplemental material for Photometry-Compendium Episode 5.
More supplemental material you can find here.