# ISO 589:1981 — Withdrawn and superseded ISO standards

For ISO 589:1981, item title is Hard coal — Determination of total moisture; status code is 9599; successor is ISO 589:2003 | ISO/DIS 589; withdrawn / published date is 1981-10-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 589:1981 _(verified: appears in the quote below)_
- **Item title:** Hard coal — Determination of total moisture _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 589:2003 | ISO/DIS 589
- **Withdrawn / published date:** 1981-10-01 _(verified: appears in the quote below)_

## What the source says

> 4686,IS,,ISO 589:1981,Hard coal — Determination of total moisture,Houille — Détermination de l'humidité totale,1981-10-01,2,['73.040'],ISO/TC 27/SC 5,9599,,"[35299,1302]","['en','fr']",6,"<p>For all hard coals two methods are specified: A) The sample is heated in a flask under reflux conditions with boiling toluene. The moisture from the coal is entrained by the toluene vapour and carried to a condenser fitted with a graduated receiver. The water then separates in the receiver, to from the lower layer, whilst the excess toluene is returned to the destillation flask by means of an overflow. The moisture in the coal is calculated from the volume of water collected. B) The sample is dried in an

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).