SIST EN 13560:2002

Surface active agents - Determination of amide nitrogen content - Potentiometric titration

This European Standard specifies a method for the determination of amide nitrogen content in surface active agents by potentiometric titration. It is not applicable to other basic substances.

Grenzflächenaktive Stoffe - Bestimmung des Gehaltes an Amid-Stickstoff - Potentiometrische Titration

Diese Europäische Norm legt ein Verfahren zur Bestimmung des Amid-Stickstoffgehaltes in grenzflächenaktiven Stoffen durch potentiometrische Titration fest. Sie ist nicht anwendbar auf andere basische Substanzen.

Agents de surface - Détermination de la teneur en azote sous forme amide - Titrage potentiométrique

La présente Norme européenne spécifie une méthode de détermination de la teneur en azote sous forme amide dans les agents de surface par titrage potentiométrique. Elle n'est pas applicable aux autres substances basiques.

Površinsko aktivne snovi - Določevanje dušika, vezanega v amidu - Potenciometrijska titracija

General Information

• Status: Published
• Publication Date: 31-May-2002
• 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-Jun-2002
• Due Date: 01-Jun-2002
• Completion Date: 01-Jun-2002
• Ref Project: EN 13560:2001 - Surface active agents - Determination of amide nitrogen content - Potentiometric titration

Relations

• Corrected By: SIST EN 13560:2002/AC:2003 - Surface active agents - Determination of amide nitrogen content - Potentiometric titration
• Effective Date: 01-Feb-2003

Overview

SIST EN 13560:2002 is a European Standard developed by CEN that specifies a precise laboratory method for determining the amide nitrogen content in surface active agents through potentiometric titration. This method applies exclusively to surface active agents and is not suitable for other basic substances. The standard ensures consistent, accurate characterization of amide nitrogen, which is critical in assessing the chemical composition and quality of surfactants used in various industrial and commercial products.

The procedure employs potentiometric titration of samples dissolved in specific solvents, primarily acetic acid anhydride and glacial acetic acid, with standard trifluoromethane sulfonic acid solution. Accurate measurement of amide nitrogen helps manufacturers and laboratories assure compliance with product specifications and regulatory requirements.

Key Topics

• Scope: Focuses on surface active agents like detergents, emulsifiers, and foam stabilizers, specifically determining amide nitrogen content.
• Principle: The sum of amide nitrogen, amine nitrogen, and soaps is measured by titration. Separate titrations allow calculation of amide nitrogen content by difference.
• Reagents: Includes glacial acetic acid, acetic acid anhydride, and standard trifluoromethane sulfonic acid solution.
• Apparatus: Standard lab equipment plus a potentiometric titration unit with combined pH glass electrode and burette.
• Sampling: Laboratory samples prepared in accordance with ISO 607 to ensure representativeness and reproducibility.
• Procedure: Detailed steps for:
  • Determining factor of titrant by tris(hydroxymethyl)aminomethane titration.
  • Potentiometric titration of the sample dissolved in acetic acid anhydride.
  • Total base nitrogen titration in glacial acetic acid.
• Calculation: Mathematical expressions to derive amide nitrogen content based on titration volumes, reagent concentration, and sample mass.
• Precision: Statistical data on repeatability and reproducibility limits validated by interlaboratory ring tests.
• Test Report: Guidelines for comprehensive documentation of sample identity, method used, results, and any deviations or observations.

Applications

SIST EN 13560:2002 is highly relevant for:

• Chemical manufacturers producing surface active agents such as soaps, detergents, emulsifiers, and wetting agents.
• Quality control laboratories conducting routine analysis to verify amide nitrogen in surfactant formulations for product consistency.
• Research and development teams developing new surfactant compounds or improving existing formulations by monitoring chemical properties.
• Regulatory compliance ensuring surfactant products meet European standards and international quality benchmarks.
• Analytical service providers offering specialized titrimetric testing to the chemical and cosmetic industries.

By applying this method, industries can maintain precise control over the chemical composition of surfactant materials, leading to enhanced product performance and regulatory conformity.

Related Standards

• ISO 607: Standard for sample division methods, ensuring laboratory samples meet representativeness criteria before analysis.
• Other surfactive agent analysis standards developed by CEN Technical Committee 276, complementing amide nitrogen determination with tests for active matter content, amine content, and pH measurement.
• General potentiometric titration guidelines as referenced for accurate volumetric analysis in chemical laboratories.

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Keywords: EN 13560, amide nitrogen determination, surface active agents, potentiometric titration, surfactant analysis, trifluoromethane sulfonic acid, acetic acid anhydride, quality control, European Standard, CEN, laboratory testing, chemical composition, surfactant quality.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Grenzflächenaktive Stoffe - Bestimmung des Gehaltes an Amid-Stickstoff - Potentiometrische TitrationAgents de surface - Détermination de la teneur en azote sous forme amide - Titrage potentiométriqueSurface active agents - Determination of amide nitrogen content - Potentiometric titration71.100.40Površinsko aktivna sredstvaSurface active agentsICS:Ta slovenski standard je istoveten z:EN 13560:2001SIST EN 13560:2002en01-junij-2002SIST EN 13560:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13560December 2001ICS 71.100.40English versionSurface active agents - Determination of amide nitrogen content- Potentiometric titrationAgents de surface - Détermination de la teneur en azotesous forme amide - Titrage potentiométriqueGrenzflächenaktive Stoffe - Bestimmung des Gehaltes anAmid-Stickstoff - Potentiometrische TitrationThis European Standard was approved by CEN on 11 November 2001.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, 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© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13560:2001 ESIST EN 13560:2002

Instrument settings.8Annex B (informative)
Typical titration curves.9Annex C (informative)
Results of the interlaboratory test.10SIST EN 13560:2002
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