SIST EN 12829:2011

Surface active agents - Preparation of water with known calcium and magnesium hardness

This European Standard specifies a method of preparing water of known calcium and magnesium hardness for use in testing surface active agents and products containing them.

Grenzflächenaktive Stoffe - Herstellung von Wasser mit bekannter Calcium- und Magnesiumhärte

Diese Europäische Norm legt ein Verfahren zur Herstellung von Wasser mit bekannter Calcium- und Magnesiumhärte zur Prüfung von grenzflächenaktiven Stoffen und Produkten, die diese enthalten, fest.

Agents de surface - Préparation d'une eau de dureté calcique et magnésienne déterminée

La présente Norme européenne prescrit une méthode pour la préparation d'une eau de dureté calcique et magnésienne déterminée pour l'essai des agents de surface et des produits qui en contiennent.

Površinsko aktivne snovi - Priprava vode z znano kalcijevo in magnezijevo trdoto

Specifikacija metode priprave vode z znano trdoto za uporabo pri preskušanju površinsko aktivnih snovi in proizvodov, ki jih vsebujejo.

General Information

• Status: Published
• Public Enquiry End Date: 09-Jul-2009
• Publication Date: 15-May-2011
• 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: 03-May-2011
• Due Date: 08-Jul-2011
• Completion Date: 16-May-2011
• Ref Project: EN 12829:2011 - Surface active agents - Preparation of water with known calcium and magnesium hardness

Relations

• Replaces: SIST EN 12829:1997 - Surface active agents - Preparation of water with known calcium hardness (ISO 2174:1990 modified)
• Effective Date: 01-Jun-2011

Overview

EN 12829:2011 (CEN) - "Surface active agents - Preparation of water with known calcium and magnesium hardness" specifies a laboratory method to produce reproducible waters of defined calcium hardness and magnesium hardness for testing surface active agents (surfactants) and surfactant-containing products. The 2011 edition supersedes EN 12829:1997 and adds an explicit procedure for preparing water with known magnesium hardness.

Key topics and technical requirements

• Scope: Method for preparing and verifying water hardness (Ca2+ and Mg2+) used in surfactant testing.
• Principle: Create concentrated stock solutions of calcium chloride dihydrate and magnesium chloride hexahydrate, verify ion content by complexometric titration with disodium EDTA, then dilute to the desired hardness.
• Reagents & standards:
  • Calcium chloride dihydrate (CaCl2·2H2O) and magnesium chloride hexahydrate (MgCl2·6H2O).
  • Standard Na2EDTA volumetric solution (0.05 mol/l) for titration.
  • Mixed indicator (Mordant Black 11 / methyl red with ammonium chloride and MgNa2EDTA) or buffered indicator tablets.
  • Ammonia solution and laboratory-grade water (EN ISO 3696 grade 3).
• Apparatus: Class A burettes, one‑mark volumetric flasks (250 ml and 1000 ml), pipettes (25 ml and 50 ml), conical flasks, analytical balance, dark-brown storage bottles.
• Verification: Determine actual Ca2+ or Mg2+ concentration of stock solutions by titration and calculate millimoles per litre (mmol/l). Use this measured concentration to compute dilution volumes to obtain target hardness.
• Units: Annex A lists conversions between mmol/l and other hardness units (mg/kg, °d, ppm, etc.).
• Safety: Follow chemical handling regulations (some reagents like potassium cyanide are referenced for indicator preparation and require special handling/destruction).

Applications and users

EN 12829:2011 is practical for laboratories and organizations that require standardized water hardness for surfactant and detergent testing:

• Surfactant and detergent R&D and quality control teams
• Analytical and consumer product testing laboratories
• Standardization committees and conformity assessment bodies
• Environmental and water‑quality labs preparing calibration waters for surfactant performance or foam studies

Using EN 12829:2011 ensures reproducible test conditions for evaluating foam stability, detergency, wetting and other surface-active properties influenced by water hardness.

Related standards

Relevant normative references include:

• EN ISO 1042 (volumetric flasks), EN ISO 648 (pipettes), EN ISO 385 (burettes)
• EN ISO 3696 (water for analytical laboratory use)
• ISO 1773 (boiling flasks)

Keywords: EN 12829:2011, surface active agents, water hardness, calcium hardness, magnesium hardness, EDTA titration, surfactant testing, CEN.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Površinsko aktivne snovi - Priprava vode z znano kalcijevo in magnezijevo trdotoGrenzflächenaktive Stoffe - Herstellung von Wasser mit bekannter Calcium- und MagnesiumhärteAgents de surface - Préparation d'une eau de dureté calcique et magnésienne déterminéeSurface active agents - Preparation of water with known calcium and magnesium hardness71.100.40Površinsko aktivna sredstvaSurface active agentsICS:Ta slovenski standard je istoveten z:EN 12829:2011SIST EN 12829:2011en,fr,de01-junij-2011SIST EN 12829:2011SLOVENSKI
STANDARDSIST EN 12829:19971DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12829
April 2011 ICS 71.100.40 Supersedes EN 12829:1997English Version
Surface active agents -Preparation of water with known calcium and magnesium hardness
Agents de surface - Préparation d'une eau de dureté calcique et magnésienne déterminée
Grenzflächenaktive Stoffe - Herstellung von Wasser mit bekannter Calcium- und Magnesiumhärte This European Standard was approved by CEN on 26 February 2011.
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 CEN-CENELEC 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12829:2011: ESIST EN 12829:2011

Units used to express water hardness .8 SIST EN 12829:2011
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