1、December 2009DEUTSCHE NORM English price group 12No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 71.100.80!$=S“1562648
2、www.din.deDDIN EN 1405Chemicals used for treatment of water intended for humanconsumption Sodium alginateEnglish version of DIN EN 1405:2009-12Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Natrium-AlginatEnglische Fassung DIN EN 1405:2009-12SupersedesDIN EN 1405:1998-08www.beuth.
3、deDocument comprises pages21DIN EN 1405:2009-12 National foreword This standard has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Wasserwesen (Water Practice Standards Commi
4、ttee), Technical Committee NA 119-04-02 AA Wasseraufbereitung. Users of this standard are advised of the reservations stated in the Introduction of the European Standard and should note that national regulations exist in Germany dealing with water for human consumption, in particular the Trinkwasser
5、verordnung (TrinkwV2001) (German Drinking Water Ordinance). Since sodium alginate is not mentioned in the list of substances for treatment and disinfection of water in accordance with article 11 of the Trinkwasserverordnung 2001, it shall not be used for the treatment of drinking water. The DIN Stan
6、dards corresponding to the International Standards referred to in clause 2 of the EN are as follows, whereby EN ISO Standards are only listed below if these have not been published as DIN EN ISO Standards with the same number: EN ISO 3696 DIN ISO 3696 Amendments This standard differs from DIN EN 140
7、5:1998-08 as follows: a) Reference to the Drinking Water Directive (Directive 98/83/EC) has been updated. b) A general warning relating to safety aspects has been included. c) General purity criteria have been given in more detail. d) A warning relating to the handling of concentrated hydrochloric a
8、cid and propan-2-ol has been included. Previous editions DIN EN 1405: 1998-08 National Annex NA (informative) Bibliography DIN ISO 3696, Water for analytical laboratory use Specification and test methods Verordnung zur Novellierung der Trinkwasserverordnung (German Regulation amending the German Dri
9、nking Water Ordinance), as of 21 May 2001, BGBl. (German Federal Law Gazette) I, No. 24, pp. 959-9801)1)Recorded in the DITR database of DIN Software GmbH, obtainable from Beuth Verlag GmbH, 10772 Berlin, Germany. 2 EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1405August 2009ICS 71.100.80 Super
10、sedes EN 1405:1998 English VersionChemicals used for treatment of water intended for humanconsumption - Sodium alginateProduits chimiques utiliss pour le traitement de leaudestine la consommation humaine - Alginate de sodiumProdukte zur Aufbereitung von Wasser fr denmenschlichen Gebrauch - Natrium-A
11、lginatThis European Standard was approved by CEN on 24 July 2009.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 re
12、ferences concerning such nationalstandards may be obtained on application to the CEN 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
13、into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia
14、, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009
15、 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1405:2009: EEN 1405:2009 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Description .5 3.1 Identification .5 3.2 Commercial form .6 3.3 Physical pr
16、operties 6 3.4 Chemical properties 7 4 Purity criteria 7 4.1 General 7 4.2 Composition of commercial product .8 4.3 Impurities and main by-products .8 4.4 Chemical Parameters 8 5 Test methods 8 5.1 Sampling .8 5.2 Analyses .8 6 Labelling - Transportation - Storage . 14 6.1 Means of delivery 14 6.2 R
17、isk and safety labelling in accordance with the EU Directives . 14 6.3 Transportation regulations and labelling . 14 6.4 Marking 14 6.5 Storage . 15 Annex A (informative) General information on sodium alginate . 16 A.1 Origin . 16 A.2 Use . 16 A.3 Rules for safe handling and use . 17 A.4 Emergency p
18、rocedures 17 Bibliography . 19 DIN EN 1405:2009-12 EN 1405:2009 (E) 3 Foreword This document (EN 1405:2009) 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 b
19、y publication of an identical text or by endorsement, at the latest by February 2010, and conflicting national standards shall be withdrawn at the latest by February 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or
20、 CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1405:1998. Annex A is informative and gives some information on origin, use and handling of sodium alginate. According to the CEN/CENELEC Internal Regulations, the national standards org
21、anizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
22、Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 1405:2009-12 EN 1405:2009 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this standard: 1) This standard provide
23、s no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA; 2) 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 produ
24、ct remain in force. NOTE Conformity with this standard does not confer 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. WARNING The use o
25、f this standard may involve hazardous substances, materials, operations and equipment. This standard does not purport to address all the safety aspects associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine th
26、e applicability of regulatory limitations prior to use. DIN EN 1405:2009-12 EN 1405:2009 (E) 5 1 Scope This European standard is applicable to sodium alginate used for treatment of water intended for human consumption. It describes the characteristics of sodium alginate and specifies the requirement
27、s and the corresponding test methods for sodium alginate. 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 (inc
28、luding any amendments) applies. EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO 3696:1987) ISO 3165, Sampling of chemical products for industrial use Safety in sampling ISO 6206, Chemical products for industrial use Sampling Vocabulary ISO 8213, Chemical products
29、 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 alginate NOTE Linear glycuronoglycan consisting mainly of (1-4) linked -D-mannuronic acid units and (1-4) linked -
30、L-guluronic acid units in pyranose ring form. 3.1.2 Synonym or common name Algin. 3.1.3 Relative molecular mass 10 000 to 250 000 approximately. 3.1.4 Empirical formula (C6O6H7Na)n. DIN EN 1405:2009-12 EN 1405:2009 (E) 6 3.1.5 Chemical formula Sodium alginate (with D-mannuronic acid units) 3.1.6 CAS
31、 Registry Number1)9005-38-3. 3.1.7 EINECS reference2)The EINECS inventory lists alginic acid, but does not apply numbers to the salts of alginic acid. The EINECS number for alginic acid is 232-68-01. 3.2 Commercial form Sodium alginate as specified in this standard is available as a solid containing
32、 a small amount of residual moisture. 3.3 Physical properties 3.3.1 Appearance The product is a white to pale yellowish-brown powder. 3.3.2 Density The bulk density of the product is typically in the range 0,7 g/cm3to 1,0 g/cm3. 3.3.3 Solubility The product is soluble in hot or cold water. Its solub
33、ility is limited only by viscosity, with a paste being formed at concentrations of approximately 50 g/l and above. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa Not applicable. 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical
34、 Substances. DIN EN 1405:2009-12 EN 1405:2009 (E) 7 3.3.6 Melting point The product decomposes at approximately 200 C. 3.3.7 Specific heat Not applicable. 3.3.8 Viscosity, dynamic Not applicable. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hard
35、ness Not applicable. 3.4 Chemical properties Sodium alginate is a non-hazardous material and not intrinsically reactive. However, in common with many other organic compounds, a strong exothermic reaction will occur if it is brought into contact in the dry state with a strong oxidizing agent or stron
36、g acid. NOTE In dilute solution there can be a reaction with, or destruction by, some of the disinfection and oxidizing agents used in water treatment. 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for sodium alginate used for the treatment of water i
37、ntended for human consumption. Limits are given for impurities commonly present in the product. 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. NOTE Users of this pr
38、oduct should check the national regulations in order to clarify whether it is of 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 the product
39、standard. Limits have been given for impurities and chemicals parameters where these are likely to be present in significant quantities from the current production process and raw materials. If the production process or raw materials leads to significant quantities of impurities, by-products or addi
40、tives being present, this shall be notified to the user. DIN EN 1405:2009-12 EN 1405:2009 (E) 8 4.2 Composition of commercial product The product consists of sodium alginate, moisture and minor levels of inorganic salts (i.e. sodium chloride and sodium sulfate). The following requirements shall appl
41、y to sodium alginate: a) sodium alginate content: minimum 80 % mass fraction calculated with reference to the dried substance; b) moisture content: less than 15 % mass fraction; c) ash: 18 % mass fraction to 32 % mass fraction on a dry basis; d) pH: 4,8 to 8,8 as 1 % mass fraction solution at 20 C;
42、e) extraneous matter: there shall be no visible extraneous matter. 4.3 Impurities and main by-products Based on the raw materials and manufacturing process (see A.1) there are no significant concentration of additional reactants or by-products which are relevant to the application of this product in
43、 drinking water treatment. 4.4 Chemical Parameters NOTE For the purpose of this standard, “chemical parameters” are those defined in the EU Directive 98/83/EC of 3 November 1998 1. Chemical parameters as defined above are not relevant at a reference dose of 0,5 mg/l. 5 Test methods 5.1 Sampling Samp
44、ling shall be in accordance with ISO 8213 and the recommendations given in ISO 3165 and ISO 6206 shall be followed. A representative sample of the solid product, of sufficient mass, shall be obtained immediately after manufacture or from a newly opened package(s). The sample shall be clearly labelle
45、d with product name/code, batch number, type of container(s) sampled and date sampled. Reference samples shall be retained for the storage life of the product as claimed by the manufacturer/supplier. 5.2 Analyses 5.2.1 General Unless otherwise specified, all reagents shall be of recognised analytica
46、l grade. The water used shall conform to grade 2 specified in EN ISO 3696. 5.2.2 Main product If additional requirements are agreed between the customer and manufacturer/ supplier, the latter shall provide the necessary methods if requested, so that the customer can carry out his own quality check.
47、A certificate of analysis shall be provided by the manufactured/supplier if requested. DIN EN 1405:2009-12 EN 1405:2009 (E) 9 5.2.2.1 Sodium alginate content 5.2.2.1.1 General This method is applicable to sodium alginates with alginate content in the range 50 % mass fraction to 100 % mass fraction.
48、5.2.2.1.2 Principle The sodium alginate (Na Alg) is converted to alginic acid by the action of dilute hydrochloric acid in the presence of propan-2-ol. The alginic acid formed is washed with a propan-2-ol/water mixture to remove excess hydrochloric acid. The alginic acid is then titrated with standa
49、rd volumetric solution alkali. Propan-2-ol is present to prevent solubilisation of low molecular weight fractions of the sodium alginate. NaCl + AlgH HCl + AlgNa OH + AlgNa NaOH + AlgH2 5.2.2.1.3 Reagents 5.2.2.1.3.1 Propan-2-ol (isopropanol). 5.2.2.1.3.2 Hydrochloric acid, c(HCl) = 2 mol/l. 5.2.2.1.3.3 Propan-2-ol diluted solution (50 + 50) (V1+ V2) of propan-2-ol with HCl (5.2.2.1.3.2). 5.2.2.1.3.4 Propan-2-ol diluted solution (75 + 25) (V1+ V2) of propan-2-ol with water. 5.2.2.1.3.5 Sodium hydroxide solution, c(NaOH) = 0,5 mol/l. 5.2.2.1
