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
Publication Date
05-Apr-2011
Current Stage
9060 - Closure of 2 Year Review Enquiry - Review Enquiry
Due Date
15-Dec-2016
Completion Date
15-Dec-2016

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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
SIST EN 12829:2011
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

EN 12829:2011 (E) 2 Contents Page Foreword ..............................................................................................................................................................31 Scope ......................................................................................................................................................42 Normative references ............................................................................................................................43 Terms and definitions ...........................................................................................................................44 Principle ..................................................................................................................................................45 Reagents .................................................................................................................................................56 Apparatus ...............................................................................................................................................67 Procedure ...............................................................................................................................................6Annex A (informative)

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

EN 12829:2011 (E) 3 Foreword This document (EN 12829:2011) 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 October 2011, and conflicting national standards shall be withdrawn at the latest by October 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12829:1997. The new edition includes the preparation of water with known magnesium hardness. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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 the United Kingdom.

SIST EN 12829:2011

EN 12829:2011 (E) 4 1 Scope 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. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 385, Laboratory glassware – Burettes (ISO 385:2005) EN ISO 648, Laboratory glassware – Single-volume pipettes (ISO 648:2008) EN ISO 1042, Laboratory glassware – One-mark volumetric flasks (ISO 1042:1998) EN ISO 3696:1995, Water for analytical laboratory use – Specification and test methods ISO 1773, Laboratory glassware – Narrow-necked boiling flasks 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 water hardness Measure for the content of dissolved calcium and magnesium salts and, in special cases, salts of strontium and/or barium NOTE 1 The unit of measurement of water hardness is the millimole per litre (mmol/l). 1 mmol/l of calcium hardness corresponds to 40,08 mg/l of calcium ions. 1 mmol/l of magnesium hardness corresponds to 24,31 mg/l of magnesium ions. NOTE 2 The equivalents for other degrees of hardness of water, as well as other units used for measuring water hardness and the relationships between them, are given for information in Annex A. NOTE .3 Originally, the hardness of a sample of water was determined by measuring its power to destroy the foam formed by soap. This property is primarily due to the presence of calcium and magnesium, but salts of other metals, such as iron, aluminium and manganese, behave in a similar manner, although these seldom occur in natural waters. 4 Principle Preparation of a stock solution by dissolving an appropriate quantity of calcium chloride or magnesium chloride in water. Determination of the calcium or magnesium ions in this stock solution by complexometric titration with the disodium salt of (ethylenedinitrilo)tetraacetic acid (EDTA) using a mixture of Mordant Black 11 (C.I. 14645) and methyl red as indicator. Preparation of dilute solutions, of the hardness required, by dilution of appropriate volumes of the stock solution. SIST EN 12829:2011

EN 12829:2011 (E) 5 5 Reagents 5.1 General 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, us

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