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Determination of the biochemical activity of sludge (activated sludge,
digested sludge etc.) by means of the dehydrogenase activity using
2,3,5-Triphenyltetrazoliumchloride (TTC).
Colourless TTC is converted into red triphenylformazane (TPF) by dehydrogenases.
The formed, water insoluble TPF is dissolved in ethanol and is photometrically determined. |