# ISO 5275:1979 — Withdrawn and superseded ISO standards

For ISO 5275:1979, item title is Aromatic hydrocarbons — Test for presence of mercaptans (thiols) — Doctor test; status code is 9599; successor is ISO 5275:2003; withdrawn / published date is 1979-10-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 5275:1979 _(verified: appears in the quote below)_
- **Item title:** Aromatic hydrocarbons — Test for presence of mercaptans (thiols) — Doctor test _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 5275:2003
- **Withdrawn / published date:** 1979-10-01 _(verified: appears in the quote below)_

## What the source says

> 11271,IS,,ISO 5275:1979,Aromatic hydrocarbons — Test for presence of mercaptans (thiols) — Doctor test,Hydrocarbures aromatiques — Essai de détection des mercaptans (thiols) — 'Doctor test',1979-10-01,1,['71.080.15'],ISO/TC 28,9599,,[34283],"['en','fr']",2,"<p>Specifies the detection of thioalcohols. Hydrogen sulphide can also be detected by the test. Inapplicable in the presence of only traces of peroxides. Shaking of a test portion with sodium plumbite solution (Doctor solution) and observation of the mixture. From its appearence, the presence of thioalcohols, hydrogen sulphide, peroxides or elemental sulphur can be deduced. Confirmation by the addition of sulphur, shaking and observation

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).