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ISO 23772:2023

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This document describes a procedure for determining the content of residual alkali in Kraft blackliquors having a dry matter content up to 40 %.

The method is based on a potentiometric titration with hydrochloric acid and is intended for blackliquor samples with an initial pH ≥ 11,0.

The lower limit of determination is 0,1 g/l of eq. NaOH.

R00001837