International Standard
ISO 6845:1989
Surface active agents — Technical alkane sulfonates — Determination of the mean relative molecular mass of the alkane monosulfonates and the alkane monosulfonate content
Reference number
ISO 6845:1989
ISO 6845:1989
Edition 2
1989-07
1989-07
© ISO 2024
International Standard
p
ISO 6845:1989
13353
Published
(Edition 2, 1989)
This standard was last reviewed and confirmed in 2019.
Therefore this version remains current.
Abstract
A test portion is dissolved in ethanol and the solution is acidified. The alkane monosulfonic acids are separated from the alkane disulfonates and sulfate ions by extraction with light petroleum. The light petroleum phase is evaporated and the residue is solved in ethanol. Traces of alkali are removed by means of a cation-exchange column. The eluate is neutralized with carbonate-free sodium hydroxide solution. The sodium alkane monosulfonates so formed are dried and weighed. The mean relative molecular mass of the alkanemonosulfonates and the alkanemonosulfonate content are calculated.
Life cycle
-
Previously
WithdrawnISO 6845:1982
-
Now
Got a question?
Check out our FAQs
Customer care
+41 22 749 08 88
Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)