# ISO 10523:1994 — Withdrawn and superseded ISO standards

For ISO 10523:1994, item title is Water quality — Determination of pH; status code is 9599; successor is ISO 10523:2008; withdrawn / published date is 1994-07-28, recorded from its source on 2026-08-05.

- **Identifier:** ISO 10523:1994 _(verified: appears in the quote below)_
- **Item title:** Water quality — Determination of pH _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 10523:2008
- **Withdrawn / published date:** 1994-07-28 _(verified: appears in the quote below)_

## What the source says

> 18592,IS,,ISO 10523:1994,Water quality — Determination of pH,Qualité de l'eau — Détermination du pH,1994-07-28,1,['13.060.50'],ISO/TC 147/SC 2,9599,,[51994],"['en','fr']",10,"<p>The method specified (using a pH-meter) is applicable to all types of water and waste water samples in the range from pH 3 to pH 10. The temperature, some gases and organic materials interfere with the pH-measurement. Suspended materials in the sample may cause significant errors. When measuring sewage and some surface waters, there is a particularly high risk of smearing the electrodes or contaminating the membranes and diaphragm with oil, grease or other contaminants.</p>"

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).