1、BRITISH STANDARD BS EN 1209:2003 Chemicals used for treatment of water intended for human consumption Sodium silicate The European Standard EN 1209:2003 has the status of a British Standard ICS 71.100.80 BS EN 1209:2003 This British Standard was published under the authority of the Standards Policy
2、and Strategy Committee on 12 January 2004 BSI 12 January 2004 ISBN 0 580 43220 3 National foreword This British Standard is the official English language version of EN 1209:2003. It supersedes BS EN 1209:1998 which is withdrawn. The UK participation in its preparation was entrusted to Technical Comm
3、ittee CII/59, Chemicals for drinking water treatment, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Additional information Article 10 of the Council of the European Community Directive 98/83/EC on the quality of wa
4、ter intended for human consumption requires Member States to ensure that substances and materials (including associated impurities) used in the preparation of drinking water do not remain in treated water at concentrations that are higher than necessary or that would reduce the protection of public
5、health provided for in the Directive. This requirement is given effect in England and Wales by regulation 25 of the Water Supply (Water Quality) Regulations 1989 (similar provisions apply in Scotland and Northern Ireland). Regulation 25 makes provision for attaching conditions of use to chemicals an
6、d filter media that are authorized for use in public water supplies. Details of conditions of use are contained in the List of Products and Processes Approved Under Regulations 25 and 26 For Use In Connection With The Supply of Water For Drinking, Washing, Cooking and Food Production Purposes publis
7、hed by the Drinking Water Inspectorate, Floor 2/A1, Ashdown House, 123 Victoria Street, London SW1 6DE (www.dwi.gov.uk). Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section enti
8、tled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Complianc
9、e with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related int
10、ernational and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 24, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document
11、was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN1209 December2003 ICS71.100.80 SupersedesEN1209:1997 Englishversion Chemicalsusedfortreatmentofwaterintendedforhuman consumptionSodiumsilicate Produitschimiquesutilisspourletra
12、itementdeleau destinelaconsommationhumaineSilicatedesodium ProduktezurAufbereitungvonWasserfrden menschlichenGebrauchNatriumsilikat ThisEuropeanStandardwasapprovedbyCENon10October2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an St
13、andardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebyt
14、ra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Nether
15、lands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalM
16、embers. Ref.No.EN1209:2003EEN1209:2003(E) 2 Contents page Foreword. 3 Introduction 4 1 Scope . 5 2 Normativereferences . 5 3 Description 6 3.1 Identification 6 3.2 Commercialform. 6 3.3 Physicalproperties. 6 3.4 Chemicalproperties . 8 4 Puritycriteria. 8 4.1 General. 8 4.2 Compositionofcommercialpro
17、duct . . 8 4.3 Chemicalparametersandindicatorparameters . 8 5 Testmethods . 9 5.1 Sampling 9 5.2 Analyses 10 6 LabellingTransportationStorage 19 6.1 Meansofdelivery. . 19 6.2 RiskandsafetylabellingaccordingtotheEUDirectives 19 6.3 Transportationregulationsandlabelling . 20 6.4 Marking 20 6.5 Storage
18、. 20 AnnexA (informative) Generalinformationonsodiumsilicate 21 AnnexB (normative) Generalrulesrelatingtosafety 23 Bibliography . 24EN1209:2003(E) 3 Foreword Thisdocument(EN1209:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC164“Watersupply”,the secretariatofwhichisheldbyAFNOR. ThisEuropeanStandardsh
19、allbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJune2004,andconflictingnationalstandardsshallbewithdrawnatthelatestby June2004. ThisdocumentsupersedesEN1209:1997. SignificanttechnicaldifferencesbetweenthiseditionandEN1209:1997areasfollows: a)
20、takingaccountofthenewEUDirective98/83/EC; b) modificationofthelimitvalueofSbto33mg/kginsteadof60mg/kg; c) modificationofthelabellingrequirementsinrelationtothemolecularratioSiO 2 :Na 2 O; d) introductionofnewmethodsfortheanalysisofiron,sulfateandfluoridein5.2.2. AnnexAisinformative. AnnexBisnormativ
21、e. Thisdocumentincludesabibliography. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Neth
22、erlands,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN1209:2003(E) 4 Introduction Inrespectofpotentialadverseeffectsonthequalityofwaterintendedforhumanconsumption,causedbythe productcoveredbythisStandard: a) thisStandardprovidesnoinformationastowhethertheproductmaybeusedwit
23、houtrestrictioninanyofthe MemberStatesoftheEUorEFTA; b) itshouldbenotedthat,whileawaitingtheadoptionofverifiableEuropeancriteria,existingnationalregulations concerningtheuseand/orthecharacteristicsofthisproductremaininforce. NOTE Conformitywiththisstandarddoesnotconferorimplyacceptanceorapprovalofth
24、eproductinanyoftheMember StatesoftheEUorEFTA.TheuseoftheproductcoveredbythisEuropeanStandardissubjecttoregulationorcontrolby NationalAuthorities.EN1209:2003(E) 5 1Scope ThisEuropeanStandardisapplicabletosodiumsilicateusedfortreatmentofwaterintendedforhuman consumption.Itdescribesthecharacteristicsan
25、dspecifiestherequirementsandthecorrespondingtestmethods forsodiumsilicate.Itgivesinformationonitsuseinwatertreatment. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetextandthe
26、publicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN1483, WaterqualityDeter
27、minationofmercury. EN26595, WaterqualityDeterminationoftotalarsenicSilverdiethyldithiocarbamatespectrophotometricmethod (ISO6595:1982). ENISO3696, WaterforanalyticallaboratoryuseSpecificationandtestmethods(ISO3696:1987). ENISO11885,WaterqualityDeterminationof33elementsbyinductivelycoupledplasmaatomi
28、cemission spectroscopy(ISO1185:1996). ISO1689, SodiumandpotassiumsilicatesforindustrialuseCalculationoftheratio:silicondioxide/sodiumoxide orsilicondioxide/potassiumoxide ISO1690, SodiumandpotassiumsilicatesforindustrialuseDeterminationofsilicacontentGravimetricmethod byinsolubilization. ISO1692, So
29、diumandpotassiumsilicatesforindustrialuseDeterminationoftotalalkalinityTitrimetricmethod. ISO3165, SamplingofchemicalproductsforindustrialuseSafetyinsampling ISO5961, WaterqualityDeterminationofcadmiumbyatomicabsorptionspectrometry. ISO6206, ChemicalproductsforindustrialuseSamplingVocabulary. ISO670
30、31, WaterqualityDeterminationofcyanidePart1:Determinationoftotalcyanide. ISO8213,ChemicalproductsforindustrialuseSamplingtechniquesSolidchemicalproductsintheformof particlesvaryingfrompowderstocoarselumps. ISO8288,WaterqualityDeterminationofcobalt,nickel,copper,zinc,cadmiumandleadFlameatomic absorpt
31、ionspectrometricmethods ISO9174, WaterqualityDeterminationofchromiumAtomicabsorptionspectrometricmethods. ISO9965, WaterqualityDeterminationofseleniumAtomicabsorptionspectrometricmethod(hydridetechnique)EN1209:2003(E) 6 3Description 3.1Identification 3.1.1 Chemicalname Sodiumsilicate. 3.1.2 Synonymo
32、rcommonnames Waterglasssolution. 3.1.3 Relativemolecularmass Dependentonmolecularratio. 3.1.4 Empiricalformula Na 2 O. nSiO 2 with nbetween1,5and4,0. 3.1.5 Chemicalformula Na 2 O. nSiO 2 with nbetween1,5and4,0. 3.1.6 CASRegistryNumber 1) 1344098. 3.1.7 EINECSreference 2) 2156874. 3.2 Commercialform
33、Sodiumsilicateisavailableasacleartoslightlyopalescentcolourlessliquid,whichcanbemixedwithwaterinany ratio,oraspowderorgranularmaterial. 3.3 Physicalproperties 3.3.1Appearance Thesolidformisafine,whitepowder,orawhitegranularmaterial. Theliquidformiscleartoslightlyopalescent. 1) ChemicalAbstractsServi
34、ceRegistryNumber. 2) EuropeanInventoryofExistingCommercialChemicalSubstances.EN1209:2003(E) 7 3.3.2Density Solution: dependingonthemolecularratioofSiO 2 :Na 2 Oandtheconcentration.Thedensityat20Ccanvaryfrom 1,2g/mlto1,7g/ml. Powder: dependingonthegrainsize:300g/dm 3 to1000g/dm 3 . 3.3.3 Solubilityin
35、water Solution: miscibleinanyproportions. Powder: miscible;maximumsolubilitydependentongrade. 3.3.4Vapour pressure Notapplicable. 3.3.5 Boilingpointat100kPa 3) Morethan100CanddependingonmolecularratioSiO 2 :Na 2 O. 3.3.6 Meltingpoint Generally800C. 3.3.7Crystallisation point Anaccuratecrystallisatio
36、npointofasodiumsilicatesolutioncannotbemeasured.Byreducingthetemperatureof thesolutiontheviscosityincreases.Aprecipitateofvariablecompositionwillform,dependingonthemolecular ratioandconcentrationofthesodiumsilicate. 3.3.8Specific heat Notknown. 3.3.9 Viscosity(dynamic) Solution: 70mPa.sto90000mPa.sa
37、t20CdependingonmolecularratioSiO 2 :Na 2 Oandconcentration. Powder: 3) 100kPa=1bar.EN1209:2003(E) 8 not applicable. 3.3.10 Criticaltemperature Notapplicable. 3.3.11 Criticalpressure Notapplicable. 3.3.12Physical hardness Notapplicable. 3.4 Chemicalproperties Sodiumsilicatereactsasfollows: withacidsb
38、yexothermicreaction,toformagel; with2or3valentions,toforminsolublesilicates; withcarbondioxide(CO 2 ),toformagelorprecipitate. 4 Puritycriteria 4.1General ThisEuropeanStandardspecifiestheminimumpurityrequirementsforsodiumsilicateusedforthetreatmentof waterintendedforhumanconsumption.Limitsaregivenfo
39、rimpuritiescommonlypresentintheproduct. Dependingontherawmaterialandthemanufacturingprocessotherimpuritiesmaybepresentand,ifso,thisshall benotifiedtotheuserandwhennecessarytorelevantauthorities. NOTE Usersofthisproductshouldsatisfythemselvesthatitisofappropriatepurityfortreatmentofwaterintendedfor h
40、umanconsumption,takingintoaccountrawwaterquality,requireddosage,contentsofotherimpuritiesandadditivesusedin theproductsnotstatedintheproductstandard,andotherrelevantfactors. Limitshavebeengivenforimpuritiesandchemicalparameterswherethesearelikelytobepresentinsignificant quantitiesfromthecurrentprodu
41、ctionprocessandrawmaterials.Iftheproductionprocessorrawmaterialsleadto significantquantitiesofotherimpuritiesbyproductsoradditivesbeingpresent,thisshallbenotifiedtotheuser. 4.2 Compositionofcommercialproduct Thecommercialproductvariesincompositionaccordingto3.1.4.Theactivemattercontentexpressedassil
42、icain percentbymass%( m/m)shallbewithin 3%ofthemanufacturersdeclaredvalues. NOTE Theactivemattercontentincommercialproductsvariesintherangeof20%percentbymass%( m/m) to65 %( m/m). ThesodiumcontentexpressedasNa 2 Ovariesfrom5%bymass%( m/m)to30%( m/m). 4.3 Chemicalparametersandindicatorparameters Thepr
43、oductshallconformtotherequirementsspecifiedinTable1.EN1209:2003(E) 9 Table1Chemicalparametersandindicatorparameters Parameters Limit mg/kgofSiO 2 Sulfate(SO 4 2 ) max. 750 Iron(Fe) max. 300 Fluoride(F ) max. 150 Antimony(Sb) max. 33 Arsenic(As) max. 9 Cadmium(Cd) max. 15 Chromium(Cr) max. 9 Cyanide(
44、CN) max. 15 Lead(Pb) max. 30 Mercury(Hg) max. 3 Nickel(Ni) max. 9 Selenium(Se) max. 60 NOTE Otherchemicalparametersandindicatorparameters(see1)arenot relevantinsodiumsilicate. 5Test methods 5.1Sampling ObservetherecommendationsofISO3165andtakeaccountofISO6206. 5.1.1Solid Preparethelaboratorysample(s)requiredbytherelevantprocedurede
