SIST EN 13955:2003

Surface active agents - Determination of Krafft point and solubility of ionic surface active agents

This European Standard specifies a method for the determination of the solubility of ionic surface active agents in water as a function of concentration and temperature and for the determination of the Krafft point by graphical evaluation of the measurement results.
In the temperature range from 0 °C to 90 °C, the solubility is determined without any limitations if the viscosity of the solution does not exceed about 700 mPas.
At temperatures below 0 °C, determination is only possible if the solvent does not freeze.
The method is applicable both to pure surface active agents and to technical products optically clear and not unduly coloured solutions.
The solubility both of solid and liquid surface active agents and of aqueous solutions of surface active agents is determined by the method specified.

Grenzflächenaktive Stoffe - Bestimmung von Krafft-Punkt und Löslichkeit von ionischen grenzflächenaktiven Stoffen

Agents de surface - Détermination du point de Krafft et de la solubilité des agents de surface ioniques

La présente Norme européenne spécifie une méthode de détermination de la solubilité des agents de surface ioniques dans l'eau en fonction de la concentration et de la température et une méthode de détermination de la température du point de Krafft par évaluation graphique a partir de résultats de mesurage.
Dans le domaine de température allant de 0 °C a 90 °C, la solubilité est déterminée sans aucune limitation si la viscosité de la solution n'excede pas 700 mPa.s.
A des températures en dessous de 0 °C, la détermination est seulement possible si le solvant ne gele pas.
La méthode est applicable a la fois aux agents de surface purs et aux produits techniques optiquement clairs et aux solutions pas trop colorées.
La méthode spécifiée détermine la solubilité a la fois des agents de surface solides et liquides et des solutions aqueuses d'agents de surface.

Površinsko aktivne snovi - Določevanje Krafftove točke in topnosti ionskih površinsko aktivnih snovi

General Information

• Status: Published
• Publication Date: 31-Jan-2003
• ICS: 71.100.40 - Surface active agents
• Technical Committee: KDS - Cosmetics, chemical disinfectants and surface active agents
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Feb-2003
• Due Date: 01-Feb-2003
• Completion Date: 01-Feb-2003
• Ref Project: EN 13955:2002 - Surface active agents - Determination of Krafft point and solubility of ionic surface active agents

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Grenzflächenaktive Stoffe - Bestimmung von Krafft-Punkt und Löslichkeit von ionischen grenzflächenaktiven StoffenAgents de surface - Détermination du point de Krafft et de la solubilité des agents de surface ioniquesSurface active agents - Determination of Krafft point and solubility of ionic surface active agents71.100.40Površinsko aktivna sredstvaSurface active agentsICS:Ta slovenski standard je istoveten z:EN 13955:2002SIST EN 13955:2003en01-februar-2003SIST EN 13955:2003SLOVENSKI
STANDARD



SIST EN 13955:2003



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13955December 2002ICS 71.100.40English versionSurface active agents - Determination of Krafft point andsolubility of ionic surface active agentsAgents de surface - Détermination du point de Krafft et dela solubilité des agents de surface ioniquesGrenzflächenaktive Stoffe - Bestimmung von Krafft-Punktund Löslichkeit von ionischen grenzflächenaktiven StoffenThis European Standard was approved by CEN on 23 October 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13955:2002 ESIST EN 13955:2003



EN 13955:2002 (E)2ContentspageForeword.31Scope.42Normative references.43Terms and definitions.44Principle.55Apparatus.56Procedure.67Expression of results.78Precision.89Test report.8Annex A (informative)
Graphical representation of the Krafft point.9SIST EN 13955:2003



EN 13955:2002 (E)3ForewordThis document (EN 13955:2002) has been prepared by Technical Committee CEN/TC 276, "Surface activeagents", the secretariat of which is held by AFNOR.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by June 2003, and conflicting national standards shall be withdrawn at the latest byJune 2003.Annex A is informative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.SIST EN 13955:2003



EN 13955:2002 (E)41 ScopeThis European Standard specifies a method for the determination of the solubility of ionic surface active agents inwater as a function of concentration and temperature and for the determination of the Krafft point by graphicalevaluation of the measurement results.In the temperature range from 0 °C to 90 °C, the solubility is determined without any limitations if the viscosity ofthe solution does not exceed about 700 mPas.At temperatures below 0 °C, determination is only possible if the solvent does not freeze.The method is applicable both to pure surface active agents and to technical products optically clear and notunduly coloured solutions.The solubility both of solid and liquid surface active agents and of aqueous solutions of surface active agents isdetermined by the method specified.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies ( including amendments).EN ISO 3696, Water for analytical laboratory use – Specification and test methods (ISO 3696:1987).ISO 383, Laboratory glassware – Interchangeable conical ground joints.3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply:3.1solubilityconcentration at that temperature at which the cloudiness disappears again on heating a cloudy surface activeagent solutionNOTESolutions of ionic surface active agents become cloudy when cooled as soon as the saturation concentrationassociated with a particular temperature is exceeded. For a given surface active agent concentration, the temperature at whichcloudiness appears decreases as the solubility of the surface active agent increases. This cloudiness disappears again if thesolution is heated.3.2Krafft pointi) temperature at which the solubility of an ionic surface active agent in water changes suddenly orii) temperature at which the saturation concentration of the surface active agent reaches its critical micelleconcentration (See annex A)SIST EN 13955:2003



EN 13955:2002 (E)54 PrincipleAn aqueous solution of the chosen co
...