ISO 23772:2023

Current Revision
Pulps - Kraft liquor - Determination of residual alkali using potentiometric titration

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ISO 23772:2023

Pulps - Kraft liquor - Determination of residual alkali using potentiometric titration

PUBLISH DATE 2023
ISO 23772:2023

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

The method is based on a potentiometric titration with hydrochloric acid and is intended for black liquor samples with an initial pH of 11.0.

The lower limit of determination is 0.1 g/l of eq. NaOH.

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