1、BSI Standards PublicationBS EN 16370:2013Chemicals used for treatmentof water intended forhuman consumption Sodium chloride for on siteelectrochlorination usingmembrane cellsBS EN 16370:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 16370:2013.The UK parti
2、cipation in its preparation was entrusted to TechnicalCommittee CII/59, Chemicals for drinking water treatment.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. User
3、s are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 76832 3ICS 71.100.80Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of th
4、eStandards Policy and Strategy Committee on 31 August 2013.Amendments issued since publicationDate Text affectedBS EN 16370:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16370 August 2013 ICS 71.100.80 English Version Chemicals used for treatment of water intended for human consumption -
5、Sodium chloride for on site electrochlorination using membrane cells Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Chlorure de sodium pour la gnration lectrochimique de chlore au moyen dlectrolyseurs membrane Produkte zur Aufbereitung von Wasser fr den mensc
6、hlichen Gebrauch - Natriumchlorid zur elektrochemischen Erzeugung von Chlor vor Ort mittels Membranzellen This European Standard was approved by CEN on 5 July 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Stand
7、ard 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
8、, 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, Bul
9、garia, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, T
10、urkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. E
11、N 16370:2013: EBS EN 16370:2013EN 16370:2013 (E) 2 Contents Page Foreword . 4 Introduction 5 1 Scope 6 2 Normative references . 6 3 Description . 6 3.1 Identification . 6 3.1.1 Chemical name . 6 3.1.2 Synonym or common name . 7 3.1.3 Relative molecular mass 7 3.1.4 Empirical formula . 7 3.1.5 Chemic
12、al formula . 7 3.1.6 CAS Registry Number 7 3.1.7 EINECS Reference 7 3.2 Commercial forms 7 3.3 Physical properties 7 3.3.1 Appearance 7 3.3.2 Density 7 3.3.3 Solubility (in water) 7 3.3.4 Vapour pressure . 8 3.3.5 Boiling point at 100 kPa . 8 3.3.6 Melting point . 8 3.3.7 Specific heat . 8 3.3.8 Vis
13、cosity (dynamic) 8 3.3.9 Critical temperature . 8 3.3.10 Critical pressure . 9 3.3.11 Physical hardness 9 3.4 Chemical properties . 9 4 Purity criteria 9 4.1 General . 9 4.2 Composition of commercial product . 9 4.3 Impurities and by-products . 10 4.4 Chemical parameters . 10 5 Test methods 11 5.1 S
14、ampling . 11 5.2 Analyses . 11 5.2.1 Main product 11 5.2.2 Impurities 12 5.2.3 Chemical parameters . 15 6 Labelling Transportation Storage 15 6.1 Means of delivery . 15 6.2 Labelling according to the EU legislation . 16 6.3 Transportation regulations and labelling 16 6.4 Marking . 16 6.5 Storage . 1
15、6 6.5.1 Long term stability . 16 6.5.2 Storage incompatibilities . 16 Annex A (informative) General information on sodium chloride for electrochlorination by membrane cells 17 BS EN 16370:2013EN 16370:2013 (E) 3 A.1 Origin 17 A.2 Chemical composition . 17 A.3 Use 17 A.3.1 Function 17 A.3.2 Form in w
16、hich the product is used 17 A.3.3 Consumption of salt for electrochlorination . 18 A.3.4 Means of application 18 A.3.5 Secondary effects. 18 A.3.6 Removal of excess product . 18 A.4 Rules for safe handling and use 18 A.5 Emergency procedures 18 A.5.1 First aid . 18 A.5.2 Spillage . 18 A.5.3 Fire 18
17、Annex B (normative) Analytical methods Determination of antimony, cadmium, chromium, iron, lead, manganese, nickel and selenium (inductively coupled plasma optical emission spectrometry (ICP-OES) . 19 B.1 General . 19 B.2 Principle 19 B.3 Reagents . 19 B.4 Apparatus . 20 B.4.1 Spectrometer ICP-OES .
18、 20 B.5 Procedure . 21 B.5.1 Test portion 21 B.5.2 Test solution . 21 B.5.3 Calibration and verification solutions . 21 B.5.4 Determination . 21 B.6 Expression of results . 23 B.6.1 Evaluation . 23 B.6.2 Calculation 23 B.6.3 Repeatability and reproducibility . 23 B.6.4 Limit of quantification (LOQ)
19、. 25 Bibliography 27 BS EN 16370:2013EN 16370:2013 (E) 4 Foreword This document (EN 16370:2013) 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 publicatio
20、n of an identical text or by endorsement, at the latest by February 2014, and conflicting national standards shall be withdrawn at the latest by February 2014. 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 sha
21、ll not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Den
22、mark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 16370:2
23、013EN 16370:2013 (E) 5 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this European Standard: a) this European Standard provides no information as to whether the product may be used without restriction in
24、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. NOTE Conformity with this European Standard does not confe
25、r or imply acceptance or approval of the product in any of the Member States of the EU or EFTA. The use of the product covered by this European Standard is subject to regulation or control by National Authorities. BS EN 16370:2013EN 16370:2013 (E) 6 1 Scope This European Standard is applicable to so
26、dium chloride intended for on site electrochlorination of water intended for human consumption using membrane cells. It describes the characteristics and specifies the requirements and the corresponding test methods for sodium chloride (see Annex B). It gives information on its use in water treatmen
27、t. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any am
28、endments) applies. EN 901:2013, Chemicals used for treatment of water intended for human consumption Sodium hypochlorite EN 973:2009, Chemicals used for treatment of water intended for human consumption Sodium chloride for regeneration of ion exchangers EN 14805:2008, Chemicals used for treatment of
29、 water intended for human consumption Sodium chloride for on site electrochlorination using non-membrane technology EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO 3696) ISO 2479, Sodium chloride for industrial use Determination of matter insoluble in water or in
30、 acid and preparation of principal solutions for other determinations ISO 2480, Sodium chloride for industrial use Determination of sulphate content Barium sulphate gravimetric method ISO 2482, Sodium chloride for industrial use Determination of calcium and magnesium contents EDTA complexometric met
31、hods 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
32、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. BS EN 16370:2013EN 1
33、6370:2013 (E) 7 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. 3.1.6 CAS Registry Number1)7647-14-5. 3.1.7 EINECS Reference2)231-598-3. 3.2 Commercial forms The product is available as rock salt, sea salt or evaporat
34、ed 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/cm3at 20 C. The bulk density depends on the particle size distribution. 3.3.3 Solubil
35、ity (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. BS EN 16370:2013EN 16370:2013 (E) 8 Key 1 Transition point NaCl NaCl 2 H2O Temperature C NaCl
36、solution Mass fraction in g/100 g - 10 25,00 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 Figure 1 Solubility curve for sodium chloride in water 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3)Not applicable. 3.3.6 Melting p
37、oint 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. 3) 100 kPa = 1 bar. BS EN 16370:2013EN 16370:2013 (E) 9 3.3.10 Critical p
38、ressure Not applicable. 3.3.11 Physical hardness The hardness of solid salt is given as 2 to 2,5 on the Mohs scale of hardness. 3.4 Chemical properties Sodium chloride is stable, non-volatile and aqueous solutions have good electrical conductivity. Sodium chloride reacts with a number of acids (e.g.
39、 sulfuric acid, phosphoric acid) and strong oxidising agents. The reactions are often complex and require heat for completion. NOTE Under certain conditions, a sodium chloride solution can cause corrosion of metallic surfaces. 4 Purity criteria 4.1 General This European Standard specifies the minimu
40、m purity requirements for sodium chloride for on site electrochlorination of water intended for human consumption using membrane cells. The basic quality of the applied salt shall meet the requirements of Codex Alimentarius for Food Grade Salt, because all components of the electrolysed salt are add
41、ed to drinking water. As the treatment chemical produced by this process is chlorine or sodium hypochlorite, limits have also been calculated from the requirements of EN 901 and of EN 973 under consideration of the demand of minimisation for those impurities commonly present in the product and the c
42、hemical parameters. Depending on the raw material and the manufacturing process other impurities may be present and, if so, this shall be notified to the user and when necessary to relevant authorities. Users of this product should check the national regulations in order to clarify whether it is of
43、appropriate purity for treatment of water intended for human consumption, taking into account raw water quality, required dosage, contents of other impurities and additives used in the product not stated in this product standard. Limits have been given for impurities and chemical parameters where th
44、ese are likely to be present in significant quantities from the current production process and raw materials. If the production process or raw materials lead to significant quantities of impurities, by-products or additives being present, this shall be notified to the user. 4.2 Composition of commer
45、cial product The composition of the commercial product shall conform to Table 1. BS EN 16370:2013EN 16370:2013 (E) 10 Table 1 Composition/Additives Composition Mass fraction of dry product NaCl 99,9 % Fe(CN)64- a)absent a)Analytical method of Fe(CN)64-: see EN 973:2009, B.3.” 4.3 Impurities and by-p
46、roducts The product shall conform to the requirements specified in Table 2. Table 2 Impurities and by-products Impurity/by-product Limit in mass fraction of NaCl content (mg/kg) Grade 1 Grade 2 Moisture, dry product 1 000 1 000 Moisture, wet product 50 000 a 50 000 Water-insoluble matter 500 1000 Br
47、omide 50 250 Iron 2 2 Manganese 0,5 1 Calcium + magnesium 25 300 Sulfate 400 600 aThe flowability of the products is reduced by a high moisture content; further information is available from the supplier of the product.The grade should be selected based on the requirements of the electrochlorination
48、 equipment depending on the susceptibility of the membrane to fouling. The electrochlorination equipment manufacturers will specify which grade can be used to meet the requirements of the Drinking Water Directive or national regulations. 4.4 Chemical parameters The products shall conform to the requ
49、irements specified in Table 3. BS EN 16370:2013EN 16370:2013 (E) 11 Table 3 Chemical parameters Parameter Limits in mg/kg of commercial product Arsenic (As) 0,3 Cadmium (Cd) 0,5 Chromium (Cr) 0,5 Mercury (Hg) 0,1 Nickel (Ni) 0,5 Lead (Pb) 2 Antimony (Sb) 2 Selenium (Se) 2 NOTE 1 The limits result from requirements of Codex Alimentarius (C.A.) for Food Grade Salt and EN 901 and EN 973 with respect to the demand of minimisation. NOTE 2 Other chemical para
