ISO 893:1978

INTERNATIONAL STANDARD 893
INTERNATIONAL ORGANIZATION FOR STANDARDlZATlON.MEWYHAPOIIHAR OPrAHHJAUHR Il0 CTAHLlAFTH3AUHH.ORGANISATlON INTERNATIONALE DE NORMALISATION
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'L Surface active agents - Technical sodium sulphonates
- Methods of analysis
Agents de surface - Alcanesulfonates de sodium techniques - Méthode d'analyse
First edition - 1978-11-01
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UDC 661.186.5 : 543
Ref. No. IS0 893-1978 (E)
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Descriptors : surfactants, al kysulphonate, chemical analysis.
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FOREWORD
IS0 (the International Organization for Standardization) is a worldwide federation
of national standards institutes (IS0 member bodies). The work of developing
International Standards is carried out through IS0 technical committees. Every
member body interested in a subject for which a technical committee has been set
up has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated
to the member bodies for approval before their acceptance as International
Standards by the IS0 Council.
International Standard IS0 893 was developed by Technical Committee ISO/TC 91,
Surface active agents, and was circulated to the member bodies in October 1977.
It has been approved by the member bodies of the following countries :
Austria I ran Poland
Belgium I reland
Romania
Brazil Italy
South Africa, Rep. of
Bulgaria Japan
Spain
Egypt, Arab Rep. of Kenya Switzerland
France Korea, Rep. of Turkey
Germany, F.R. Mexico United Kingdom
Hungary Netherlands
U.S.A.
India New Zealand U S.S. R.
No member body expressed disapproval of the document.
This International Standard cancels and replaces IS0 Recommendation R 893-1968,
of which it constitutes a technical revision.
Q International Organization for Standardization, 1978 0
Printed in Switzerland

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INTERNATIONAL STANDARD IS0 893-1978 (E)
Surface active agents - Technical sodium alkane sulphonates
- Methods of analysis
3 REFERENCES
O INTRODUCTION
Sodium alkane sulphonates have the general formula IS0 607, Surface active agents and detergents - Methods of
sample division. )
R - (SO,Na),
IS0 894, Surface active agents - Technical sodium primary
R is a saturated aliphatic radical having a mean chain
where
alkylsulphates - Method of analysis.
lenyth of about 12 to 20 carbon atoms, and n may be 1
,L
or 2. They are sodium salts of mono- and disulphonic IS0 1 104, Surface active agents - Technical sodium alkyl-
acids. arylsulphonates (excluding benzene derivatives) - Method
of analysis.
They are obtained by sulphochlorination and sulphoxidation
IS0 3206, Surface active agents - Analysis of technical
of straightchain paraffins free from branchedchain
alkane sulphonates - Determination of alkane mono-
compounds.
sulphonates con tent.
IS0 4314, Surface active agents - Determination of free
1 SCOPE
alkalinity or free acidity - Titrime fric method.
This International Standard specifies methods of analysis of
IS0 4316, Surface active agents - Determination of the pH
technical sodium alkanesulphonates. It covers the following :
of aqueous solutions - Potentiometric method.
- Measurement of pH.
IS0 4317, Surface active agents - Determination of water
- Determination of water content.
content - Karl Fischer method.
- Determination of free alkalinity or free acidity.
IS0 431 8, Surface active agents and soaps - Determination
of water content - Azeotropic distillation method.
- Determination of matter extractable by light
petroleum.
IS0 6121, Surface active agents - Technical alkane
sulphonates - Determination of alkane monosulphonates
- Determination of sodium alkane sulphonates content.
content - Direct two-phase titration method.
L
- Determination of alkane monosulphonates content.
IS0 6122, Surface active agents - Technical alkane
- Determination of sodium sulphite content.
sulphonates - Determination of total alkane sulphonates
con tent.
- Determination of sodium sulphate content.
- Determination of sodium chloride content.
It also sets out, in annexes :
4 GENERAL PRINCIPLE^)
A : a general scheme of analysis;
Dissolution of the laboratory sample in an appropriate
B : a method for thedetermination of total salts content.
volume of water so that the content of technical sodium
alkane sulphonates is approximately 20 to 30 % (m/m).
2 FIELD OF APPLICATION
From an aliquot portion of this solution, known as the
dilute sample, preparation of an aqueous alcoholic solution
This International Standard is applicable to technical
from which the products extractable by light petroleum are
sodium alkane sulphonates in powder, paste or liquid form,
isolated.
free from any products extraneous to their manufacture.
1) At present at the stage of draft. (Revision of ISO/R 607-1967.)
2) See the general scheme of analysis in annex A.
1

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IS0 893-1978 (E)
On other portions of the dilute sample : 6.2.1 Karl Fischer method
- determination of alkane sulphonates content;
Carry out the determination of water content by the
method specified in IS0 4317.
- determination of alkane monosulphonates content;
- determination of sodium sulphate content; 6.2.2 Azeotropic distillation method
- determination of sodium chloride content. Carry out the determination of water content by the
method specified in IS0 4318.
On separate test portions of the laboratory sample :
- measurement of pH;
6.3 Determination of free alkalinity or free acidity
- determination of water content;
Carry out the determination of free alkalinity or free
acidity by the method specified in IS0 4314.
- determination of free alkalinity or free acidity;
- determination of sodium sulphite content.
6.4 Determination of matter extractable by light
petroleum
Carry out the determination of matter extractable by light
5 SAMPLING
petroleum by the method specified in 6.4 of IS0 1104, on
a test portion of 80 g, weighed to the nearest 0,05 g, of the
5.1 Laboratory sample
dilute sample (5.2).
Prepare and store a laboratory sample of approximately
The combined aqueous alcoholic residue, LI (see annex A),
3009 of raw product according to the instructions given
can be used for the determination of total salts content
in IS0 607.
(see annex B); this determination may be used to check
...