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ISO/CD 4316

Surface active agents — Determination of pH of aqueous solutions — Potentiometric method

General information

Current stage: 30.99 Effective date: Feb 9, 2026

Originator: ISO

Owner: ISO/TC 91

Type: International Standard

Scope

The determination is carried out in the following way: Potentiometric measurement of the potential difference between a glass electrode and a reference electrode dipping in an aqueous solution of the sample. This method is only applicable when so indicated in the specific standard for each product.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 4316:1977

NOW

IN_DEVELOPMENT
ISO/CD 4316
30.99 CD approved for registration as DIS
Feb 9, 2026