GB/T 46757-2025 Active National standards

GB/T 46757-2025 Pulps—Kraft black liquor—Determination of residual alkali(potentiometric titration)

Publish Date: 2025-12-02 Implement Date: 2026-07-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 46757-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Paper pulp and cardboard

ICS Name: \nPulp

Publish Date: 2025-12-02

Implement Date: 2026-07-01

Pages: 12 pages

Scope

This document describes the method of determining the residual alkali concentration in sulfate black liquor using potentiometric titration.
This document is applicable to the determination of residual alkali concentration in sulfate black liquor with an initial pH of not less than 11.0 and a solids content of not more than 40%.
This document specifies that the detection limit of the method is 0.1 g/L (calculated as NaOH).