# ISO Guide 33:2015 — Withdrawn and superseded ISO standards

For ISO Guide 33:2015, item title is Reference materials —  Good practice in using reference materials; status code is 9599; successor is ISO 33403:2024; withdrawn / published date is 2015-02-05, recorded from its source on 2026-08-05.

- **Identifier:** ISO Guide 33:2015 _(verified: appears in the quote below)_
- **Item title:** Reference materials —  Good practice in using reference materials _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 33403:2024
- **Withdrawn / published date:** 2015-02-05 _(verified: appears in the quote below)_

## What the source says

> 46212,GUIDE,,ISO Guide 33:2015,Reference materials — Good practice in using reference materials,Matériaux de référence — Bonne pratique d'utilisation des matériaux de référence,2015-02-05,3,['71.040.30'],ISO/TC 334,9599,"[29126,33189]",[84224],"['en','fr','ru']",31,"<p>ISO Guide 33:2015 describes good practice in using reference materials (RMs), and certified reference materials (CRMs) in particular, in measurement processes. These uses include the assessment of precision and trueness of measurement methods, quality control, assigning values to materials, calibration, and the establishment of conventional scales. This Guide also relates key characteristics of various types of RMs to the dif

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).