SIST EN ISO 4320:1997

SLOVENSKI STANDARD
SIST EN ISO 4320:1997
01-december-1997
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Non-ionic surface active agents - Determination of cloud point index - Volumetric method
(ISO 4320:1977, Including Erratum:1980)
Nichtionische Tenside - Bestimmung der Trübungstitrationszahl - Volumetrisches
Verfahren (ISO 4320:1977, einschließlich Erratum:1980)
Agents de surface non ioniques - Détermination de l'indice de trouble - Méthode
volumétrique (ISO 4320:1977, Erratum:1980 inclus)
Ta slovenski standard je istoveten z: EN ISO 4320:1997
ICS:
71.100.40 Površinsko aktivna sredstva Surface active agents
SIST EN ISO 4320:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 4320:1997

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SIST EN ISO 4320:1997

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SIST EN ISO 4320:1997

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SIST EN ISO 4320:1997
INTERNATIONAL STANDARD
4320
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION l MEXKAYHAPOJ.lHAJI OPTAHM3AUMR l-IO CTAHLIAPTM3AUWM.ORGANISATION INTERNATIONALE DE NORMALISATION
Non-ionic surface active agents - Determination of cloud
point index - Volumetric method
Determination de I’indice de trouble - Mbthode volum&rique
Agents de surface non ioniques -
First edition - 1977-02-01
UDC 661.185 : 543 Ref. No. ISO 4320-1977 (E)
Descriptors : surfactants,
non-ionic surfactants, tests, determination, cloud Point, volumetric analysis.
Price based on 3 pages

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SIST EN ISO 4320:1997
ISO (the International Organization for Standardization) is a worldwide federation
of national Standards institutes (ISO member bodies). The work of developing
International Standards is carried out through ISO technical committees. Every
member body interested in a subject for which a technical committee has been set
International organizations,
up has the right to be represented on that committee.
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 ISO Council.
International Standard ISO 4320 was drawn up by Technical Committee
ISO/TC 91, Surface active agents, and was circulated to the member bedies in
October 1975.
lt has been approved by the member bodies of the following countries :
Austria Iran Portugal
Belgium I taly Romania
Brazil Japan South Africa, Rep. of
Canada Korea, Dem. P. Rep. of Spain
France Mexico Switzerland
Germany Netherlands Turkey
Hungary New Zealand United Kingdom
India Poland U.S.A.
No member body expressed disapproval of the document.
0 International Organkation for Standardization, 1977 l
Printed in Switzerland

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SIST EN ISO 4320:1997
INTERNATIONAL STANDARD ISO 43204977 (E)
Non-ionic surface active agents - Determination of cloud
Point index - Volumetric method
5 PRINCIPLE
C9 INTRODUCTION
Addition, at 30 ‘C, of distilled water to a propanol Solution
Determination of the cloud Point index provides a way of
sf the surface active agent until the appearance of
characterizing weakly alkoxylated derivatives and their
cloudiness.
hydrocarbon hydrophobic groups.
This simple and rapid measurement is a valuable means for
checking the level of alkoxylation of non-ionic derivatives
intended, for example, for sulphonation.
6 REAGENTS
1 SCOPE
6.1 Distilled water.
This International Standard specifies a volumetric method
for the determination of the cloud Point index of non-ionic
surface active agents.
6.2 Propan-Vol, complying with the following require-
ments :
2 FIELD OF APPLICATION
-
assay (by gas chromatography) 99 % (m/m);
The method is applicable to weakly alkoxylated non-ionic
-
surface active agents (1 to 5 oxyethylene groups) the
density p20 0,804 to 0,805 g/ml;
hydrophobic group of which is provided by an alcohol, an
-
refractive index nE” 1,384 to 1,385;
alkylphenol or a fatty acid (provided that the last has a
melting Point lower than 30 “C), subject to the product
-
non-volatile matter < 0,005 % (mlm);
being soluble in propan-1 -01 to the extent of 1 g in 10 ml
at 30 “C. free acidity (expressed as C2HsCOOH) < O,Ol%
mm;
I/ 1
lt is equally applicable to Iipophilic bases derived from
-
alcohols, alkylphenols and fatty
...