SIST EN 973:2002

Chemicals used for treatment of water intended for human consumption - Sodium chloride for regeneration of ion exchangers

This European Standard is applicable to sodium chloride intended for use only in water treatment apparatus, for the regeneration of ion exchangers, intended for water for human consumption. It describes the characteristics and specifies the requirements and the corresponding test methods for sodium chloride. It gives information on its use in water treatment.

Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumchlorid zum Regenerieren von Ionenaustauschern

Diese Europäische Norm gilt für Natriumchlorid zum Einsatz in Wasseraufbereitungsapparaten zum Regenerieren von Ionenaustauschern für den menschlichen Gebrauch. Sie beschreibt die Eigenschaften und legt die Anforderungen sowie die entsprechenden Prüfverfahren für Natriumchlorid fest. Sie gibt Informationen für seine Anwendung in der Wasseraufbereitung.

Produits chimiques utilisés pour le traitement de l'eau destinée a la consommation humaine - Chlorure de sodium pour la régénération des résines échangeuses d'ions

Cette Norme européenne est applicable au chlorure de sodium  utilisé uniquement dans l'appareillage de traitement de l'eau destinée à la consommation humaine, pour la régénération des résines échangeuses d'ions. Elle décrit les caractéristiques et spécifie les prescriptions et les méthodes d'essai correspondantes du chlorure de sodium. Elle donne les informations pour son emploi dans le traitement de l'eau.

Kemikalije, ki se uporabljajo za pripravo pitne vode – Natrijev klorid za regeneracijo ionskih izmenjevalnikov

General Information

• Status: Withdrawn
• Publication Date: 30-Nov-2002
• Withdrawal Date: 10-Nov-2009
• ICS: 13.060.20 - Drinking water
• ICS: 71.100.80 - Chemicals for purification of water
• Technical Committee: IOVO - Water supply and waste water engineering
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 04-Nov-2009
• Due Date: 27-Nov-2009
• Completion Date: 11-Nov-2009
• Directive: 93/38/EEC - Procurement procedures of entities operating in the water, energy, transport and telecommunications sectors
• Mandate: M/BC/CEN/88/15 - Standardization request to CEN/CENELEC in the field of Water supply, drainage and sewerage
• Ref Project: EN 973:2002 - Chemicals used for treatment of water intended for human consumption - Sodium chloride for regeneration of ion exchangers

Relations

• Replaced By: SIST EN 973:2009 - Chemicals used for treatment of water intended for human consumption - Sodium chloride for regeneration of ion exchangers
• Effective Date: 01-Dec-2009
• Amended By: SIST EN 973:2002/A1:2003 - Chemicals used for treatment of water intended for human consumption - Sodium chloride for regeneration of ion exchangers
• Effective Date: 01-Oct-2003

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2002
Kemikalije, ki se uporabljajo za pripravo pitne vode – Natrijev klorid za
regeneracijo ionskih izmenjevalnikov
Chemicals used for treatment of water intended for human consumption - Sodium
chloride for regeneration of ion exchangers
Produkte zur Aufbereitung von Wasser für den menschlichen Gebrauch - Natriumchlorid
zum Regenerieren von Ionenaustauschern
Produits chimiques utilisés pour le traitement de l'eau destinée a la consommation
humaine - Chlorure de sodium pour la régénération des résines échangeuses d'ions
Ta slovenski standard je istoveten z: EN 973:2002
ICS:
13.060.20 Pitna voda Drinking water
71.100.80 .HPLNDOLMH]DþLãþHQMHYRGH Chemicals for purification of
water
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 973
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2002
ICS 71.100.80
English version
Chemicals used for treatment of water intended for human
consumption - Sodium chloride for regeneration of ion
exchangers
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Wasser für den
destinée à la consommation humaine - Chlorure de sodium menschlichen Gebrauch - Natriumchlorid zum
pour la régénération des résines échangeuses d'ions Regenerieren von Ionenaustauschern
This European Standard was approved by CEN on 23 December 2001.
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 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 Management Centre has the same status as the official
versions.
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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 973:2002 E
worldwide for CEN national Members.

Contents
page
Foreword.3
1 Scope .4
2 Normative references .4
3 Description .5
3.1 Identification.5
3.2 Commercial forms .5
3.3 Physical properties.5
3.4 Chemical properties .7
4 Purity criteria.7
4.1 Composition of commercial product .7
4.2 Impurities and main by-products .8
4.3 Chemical parameters.8
5 Test methods.9
5.1 Sampling.9
5.2 Analyses .9
6 Labelling – Transportation - Storage .10
6.1 Means of delivery.10
6.2 Risk and safety labelling in accordance with the EU directives.10
6.3 Transportation regulations and labelling .10
6.4 Marking .10
6.5 Storage.10
Annex A (informative)  General information on sodium chloride.11
A.1 Origin.11
A.2 Use.11
A.3 Rules for safe handling and use.11
A.4 Emergency procedures .12
Annex B (normative)  Analytical methods .13
B.1 Determination of antimony, arsenic, cadmium, chromium, lead, nickel and selenium
(inductively coupled plasma optical emission spectrometry (ICP/OES)) .13
B.2 Determination of total mercury (cold vapour atomic absorption spectrometry) .19
B.3 Determination of water-soluble hexacyanoferrate (II) (molecular absorption spectrometry) .25
B.4 Determination of potassium (Flame atomic absorption spectrometric method) .28
Annex C (informative)  Determination of cadmium, chromium, nickel and lead (flame atomic
absorption spectrometry.32
C.1 Determination of cadmium.32
C.2 Determination of chromium.36
C.3 Determination of nickel .40
C.4 Determination of lead .43
Annex D (informative)  Determination of arsenic, antimony and selenium (atomic absorption
spectrometry hydride technique).48
D.1 General principle.48
D.2 Interferences.48
D.3 Reagents.48
D.4 Apparatus .50
D.5 Procedure .51
D.6 Calculation.53
Foreword
This document (EN 973:2002) has been prepared by Technical Committee CEN/TC 164 "Water supply", 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 2003, and conflicting national standards shall be withdrawn at the latest
by February 2003.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries 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.
The annexes A, C and D are informative.
Annex B is normative.
Introduction
In respect of potential adverse effects on the quality of water intended for human consumption, caused by the
product covered by this standard :
a) this standard provides no information as to whether the product may be used without restriction in any of the
Member States of the EU or EFTA ;
b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations
concerning the use and/or the characteristics of this product remain in force.
1 Scope
This European Standard is applicable to sodium chloride intended for use only in water treatment apparatus, for the
regeneration of ion exchangers, intended for water for human consumption. It describes the characteristics and
specifies the requirements and the corresponding test methods for sodium chloride. It gives information on its use
in water treatment.
2 Normative references
This European Standard incorporates by dated and undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696:1987).
ISO 2479, Sodium chloride for industrial use – Determination of matter insoluble in water or in acid and preparation
of principal solutions for other determinations.
ISO 2480, Sodium chloride for industrial use – Determination of sulfate content – Barium sulfate gravimetric
method.
ISO 2482, Sodium chloride for industrial use – Determination of calcium and magnesium contents – EDTA
complexometric method.
ISO 2483, Sodium chloride for industrial use – Determination of the loss of mass at 110 °C.
ISO 3165, Sampling of chemical products for industrial use - Safety in sampling.
ISO 6206, Chemical products for industrial use – Sampling – Vocabulary.
ISO 6227, Chemical products for industrial use – General method for determination of chloride ions –
Potentiometric method.
ISO 8213, Chemical products for industrial use – Sampling techniques – Solid chemical products in the form of
particles varying from powders to coarse lumps.
3 Description
3.1 Identification
3.1.1 Chemical name
Sodium chloride.
3.1.2 Synonym or common name
Salt.
3.1.3 Relative molecular mass
58,45.
3.1.4 Empirical formula
NaCl.
3.1.5 Chemical formula
NaCl.
1)
3.1.6 CAS Registry Number
7647-14-5.
2)
3.1.7 EINECS Reference
231-598-3.
3.2 Commercial forms
The product is available as rock salt, sea salt or evaporated salt, and it is supplied as free-flowing crystals or their
compacted forms.
3.3 Physical properties
3.3.1 Appearance
The product is white and crystalline.
3.3.2 Density
The density of the solid crystal is 2,16 g/cm at 20 °C.
The bulk density depends on the particle size distribution.
3.3.3 Solubility (in water)
The solubility of the product depends on the temperature as given in Figure 1.

1) Chemical Abstract Service Registry Number.
2) European Inventory of Existing Commercial Chemical Substances.
Temperature NaCl solution
°C % (m/m)
- 10 25,0
0 26,34
10 26,35
20 26,43
30 26,56
40 26,71
50 26,89
60 27,09
70 27,30
80 27,53
90 27,80
100 28,12
Key
1 Transition point
NaCl
NaCl.2H O
Figure 1 - Solubility curve for sodium chloride in water
3.3.4 Vapour pressure
Not applicable.
3)
3.3.5 Boiling point at 100 kPa
Not applicable.
3.3.6 Melting point
802 °C.
3.3.7 Specific heat
Approximately 850 J/(kg⋅K) at 25 °C for the solid.
3.3.8 Viscosity (dynamic)
The viscosity of the saturated solution at 20 °C is approximately 1,9 mPa⋅s.
3.3.9 Critical temperature
Not applicable.
...