EN ISO 2870:1994

SLOVENSKI STANDARD
01-december-1997
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Surface active agents - Detergents - Determination of anionic-active matter hydrolyzable
and non-hydrolyzable under acid conditions (ISO 2870:1986)
Tenside - Waschmittel - Bestimmung von sauer hydrolysierbaren und nicht-
hydrolysierbaren anionaktiven Anteilen (ISO 2870:1986)
Agents de surface - Détergents - Détermination de la matiere active anionique
hydrolysable et non hydrolysable en milieu acide (ISO 2870:1986)
Ta slovenski standard je istoveten z: EN ISO 2870:1994
ICS:
71.100.40 Površinsko aktivna sredstva Surface active agents
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEIKfiYHAPO~HAR OPl-AHM3ALWlR l-l0 CTAH~APTM3ALWl.ORGANISATlON INTERNATIONALE DE NORMALISATION
Surface active agents - Detergents - Determination of
anionic-active matter hydrolyzable and non-hydrolyzable
under acid conditions
Determination de Ia mati&re active anionique hydrolysable et non hydrolysable en mifieu
Agents de surface - Dktergents -
acide
Second edition - 1986-05-01
Ref. No. ISO 28704986 (E)
UDC 661.185: 543
determination of content, anionic-active matter, volumetric analysis.
surfactants, detergents, Chemical analysis,
Descriptors :
Price based on 3 pages
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards bodies (ISO member bodies). The work of preparing International
Standards is normally carried out through ISO technical committees. Esch member
body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take patt 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 ISO Council. They are approved in accordance with ISO procedures requiring at
least 75 % approval by the member bodies voting,
International Standard ISO 2870 was prepared by Technical Committee ISO/TC 91,
Surface active agents.
This second edition cancels and replaces the first edition (ISO 287049731, of which it
constitutes a minor revision.
Users should note that all International Standards undergo revision from time to time
and that any reference made herein to any other International Standard implies its
latest edition, unless otherwise stated.
International Organkation for Standardkation, 1986 l
Printed in Switzerland
INTERNATIONAL STANDARD ISO 28704986 (E)
Determination of
Surface active agents - Detergents -
anionic-active matter hydrolyzable and non-hydrolyzable
under acid conditions
1 Scope and field of application 4 Reagents
This International Standard specifies a method for the deter- During the analysis, use only reagents of recognized analytical
mination, in detergents, of anionic-active matter hydrolyzable grade and only distilled water or water of equivalent purity.
and non-hydrolyzable under acid conditions.
In addition to the reagents mentioned in ISO 2271 and given
This active matter includes alkyl sulfates and hydroxysulfates below as a reminder :
and alkylphenol and fatty alcohol ethoxysulfates.
4.1 Chloroform, &?20 148 g/ml, distilling between 59,5 and
The mean relative molecular mass of the two types of active
613 OC.
matter must be known or previously determined, if their con-
tent is expressed as a percentage by mass. If the detergent con-
acid, 245 g/l Solution.
4.2 Sulfuric
tains Perborate, this must be destroyed before the hydrolysis.
4.3 Sulfuric acid, 49 g/l Solution.
2 References
4.4 Sodium hydroxide, Standard volumetric Solution,
ISO 607, Surface active agents - Detergents - Methods of
c(NaOH) = 1,0 mol/l.
Sample division.
4.5 Sodium lauryl sulfate, Standard volumetric Solution,
ISO 2271, Surface active agents - Detergents - Determina-
c[CH3(CH2)110S03Nal = 0,004 mol/l.
tion of anionic-active matter (direct two-Phase titration pro-
cedure).
4.6 Benzethonium chloride, Standard volumetric Solution,
c(C~~H~~CINO~~ H20) = 0,004 mol/l.
3 Principle
4.7 Phenolphthalein, 10 g/l ethanolic solution.
Titration of an aliquot Portion of a Sample Solution with
benzethonium chloride Solution according to the direct two-
4.,8 Mixed indicator Solution.
Phase titration procedure specified in ISO 2271.
the following reagents are necessary :
Hydrolysis, by refluxing under acid conditions, of a second ali-
quot Portion of the Sample Solution after destruction, if
4.9 Sulfuric acid, 490 g/l Solution.
nece
...