EN 14881:2005

SLOVENSKI STANDARD
01-januar-2006
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Surface active agents - Determination of N-(3-dimethylaminopropyl)-alkylamide content
in alkylamidopropylbetaines - Gas chromatographic method
Grenzflächenaktive Stoffe - Bestimmung des Gehaltes an N-(3-dimethyl-aminopropyl)-
alkylamid in Alkylamidopropylbetainen - Gaschromatographisches Verfahren
Agents de surface - Détermination de la teneur en N-(3-diméthylaminopropyl)-alkylamide
dans les alkylamidopropylbétaines - Méthode par chromatographie en phase gazeuse
Ta slovenski standard je istoveten z: EN 14881:2005
ICS:
71.100.40 Površinsko aktivna sredstva Surface active agents
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 14881
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2005
ICS 71.100.40
English Version
Surface active agents - Determination of N-(3-
dimethylaminopropyl)-alkylamide content in
alkylamidopropylbetaines - Gas chromatographic method
Agents de surface - Détermination de la teneur en N-(3- Grenzflächenaktive Stoffe - Bestimmung des Gehaltes an
diméthylaminopropyl)-alkylamide dans les N-(3-dimethyl-aminopropyl)-alkylamid in
alkylamidopropylbétaïnes - Méthode par chromatographie Alkylamidopropylbetainen - Gaschromatographisches
en phase gazeuse Verfahren
This European Standard was approved by CEN on 8 July 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14881:2005: E
worldwide for CEN national Members.

Contents
Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Principle.4
4 Reagents.4
5 Apparatus .5
6 Sampling and preparation of the sample .5
7 Procedure .5
8 Calculation and expression of results.6
9 Precision.6
10 Test report .6
Annex A (informative) N-(3-(dimethylaminopropyl)-undecylamide.7
Annex B (informative) Reference gas chromatogram.8
Annex C (informative) Validation method.10
Annex D (informative) Inter-laboratory test results.11
Bibliography.12

Foreword
This European Standard (EN 14881:2005) has been prepared by Technical Committee CEN/TC 276 “Surface
active agents”, 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 or
by endorsement, at the latest by February 2006, and conflicting national standards shall be withdrawn at the latest
by February 2006.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

1 Scope
This European Standard specifies a method for the determination of the content of free N-(3-dimethylaminopropyl)-
alkylamides (amidoamine) in alkylamidopropylbetaines, expressed in grams per 100 g of product.
This method is applicable in the range between 0,02 g and 1,0 g of amidoamine per 100 g of product.
2 Normative references
The following referenced documents are indispensable for the application of this European Standard. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced document
(including any amendments) applies.
EN ISO 3696, Water for analytical laboratory use – Specification and test methods (ISO 3696:1987)
ISO 607, Surface active agents and detergents – Methods of sample division
3 Principle
The method is based on the amidoamine extraction with diethyl ether at alkaline pH and subsequent analysis of the
organic extract by GLC-FID. The chromatogram resolves the different amidoamines according to their alkyl chain
length. The result is calculated from the sum of all the chain homologues.
4 Reagents
WARNING: Your attention is drawn to the regulations covering the handling of hazardous substances.
Technical organisational and personal protection measures should be observed.
During the analysis, unless otherwise specified, use only reagents of recognized analytical grade that have been
checked in advance as not interfering with the analytical results.
4.1 Water, complying with grade 3 as defined in EN ISO 3696.
NOTE If the water is purified via ion-exchange resins, ensure that no cationic or anionic species from the resins cause
interference.
4.2 Ethanol
4.3 Diethyl ether
4.4 N-(3-dimethylaminopropyl)-undecylamide (amidoamine-C11), purity ≥ 98 % m/m.
NOTE The N-(3-dimethylaminopropyl) alkylamide standard preparation and purity determination are given in Annex A.
4.5 Potassium hydroxide, ethanolic solution c (KOH)= 1 mol/l.
4.6 Internal standard solution
Weigh in a 50 ml volumetric flask, to the nearest 0,1 mg, approximately 0,2 g of the amidoamine-C11 (4.4).
Dissolve and make up to the mark with ethanol (4.2). Keep tightly closed.
4.7 Sodium chloride, aqueous solution, 30 % m/m.
4.8 Phenolphthalein, solution of 1 % m/V in ethanol.
5 Apparatus
Ordinary laboratory apparatus and the following.
5.1 Gas chromatograph, with capillary split injector, flame ionisation detector and integrator or compute
...