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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

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Kehtiv alates 06.07.1989
Tegevusala (ICS grupid)
71.100.40 Pindaktiivsed ained
Direktiivid või määrused
puuduvad

Standardi ajalugu

Staatus
Kuupäev
Tüüp
Nimetus
06.07.1989
Põhitekst
Põhitekst
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.

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