1、Chemicals used for treatment of water intended for human consumption - Calcium carbonate, high-calcium lime, half-burnt dolomite, magnesium oxide, calcium magnesium carbonate and dolomitic lime - Test methodsBS EN 12485:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013
2、15:06EUROPEANSTANDARDNORME EUROPENNE EUROPISCHE NORMEN 12485 July 2017ICS 71.100.80 Supersedes EN 12485:2010EnglishVersionChemicals used for treatment of water intended for human consumption - Calcium carbonate, high-calcium lime, half-burnt dolomite, magnesium oxide, calcium magnesium carbonate and
3、 dolomitic lime - Test methodsProduits chimiques utiliss pour le traitement de leau destine la consommation humaine - Carbonate de calcium, chaux, dolomie semi-calcine, oxyde demagnsium, carbonate de calcium et de magnsium etchaux dolomitique - Mthodes dessaiProdukte zur Aufbereitung von Wasser fr d
4、en menschlichen Gebrauch - Calciumcarbonat, Weikalk,halbgebrannter Dolomit, Magnesiumoxid,Calciummagnesiumcarbonat und Dolomitkalk -PrfverfahrenThis European Standard was approved by CEN on 24 April 2017.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the co
5、nditions for giving thisEuropean Standard the status of a national standard without any alteration.Up-to-date lists and bibliographical referencesconcerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists
6、 in three official versions (English, French, German). A version in any other language made bytranslation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC ManagementCentre has the same status as the officialversions.CEN members are the nationalstandards
7、bodies of Austria, Belgium, Bulgaria, 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, Serbia, Slovakia,
8、Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved
9、worldwide for CENnational Members.Ref. No. EN 12485:2017 ENational forewordThis British Standard is the UK implementation of EN 12485:2017. It supersedes BS EN 12485:2010, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee CII/59, Chemicals for drinking w
10、ater treatment.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017 Publishe
11、d by BSI Standards Limited 2017ISBN 978 0 580 90349 6ICS 13.060.20; 71.100.80Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2017.Amendments/corrig
12、enda issued since publicationDate Text affectedBRITISH STANDARDBS EN 12485:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12485 July 2017 ICS 71.100.80 Supersedes EN 12485:2010English Version Chemicals used for treatment of water intended for human consumption - Calcium carbonate, high-cal
13、cium lime, half-burnt dolomite, magnesium oxide, calcium magnesium carbonate and dolomitic lime - Test methods Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Carbonate de calcium, chaux, dolomie semi-calcine, oxyde de magnsium, carbonate de calcium et de magn
14、sium et chaux dolomitique - Mthodes dessai Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Calciumcarbonat, Weikalk, halbgebrannter Dolomit, Magnesiumoxid, Calciummagnesiumcarbonat und Dolomitkalk - Prfverfahren This European Standard was approved by CEN on 24 April 2017. CEN mem
15、bers 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 applicat
16、ion 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 Manage
17、ment 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
18、 Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue
19、 Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12485:2017 EBS EN 12485:2017EN 12485:2017 (E) 2 Contents Page European foreword . 6 1 Scope 7 2 Normative references 7 3 General requirements . 7 3.1
20、Number of determinations 7 3.2 Methods for analysis 8 3.3 Sample preparation . 10 3.4 Reagents 10 3.5 Glassware 11 3.6 Expression of results . 11 3.7 Repeatability and reproducibility limits . 12 3.8 Test report 12 4 Determination of screen oversize of high-calcium lime 12 4.1 Air-jet sieving method
21、 12 4.1.1 General . 12 4.1.2 Apparatus 12 4.1.3 Procedure 13 4.1.4 Expression of results . 14 4.2 Wet sieving method . 14 4.2.1 General . 14 4.2.2 Apparatus 14 4.2.3 Procedure 15 4.2.4 Expression of results . 15 5 Preparation of test solutions . 15 5.1 Fusion with lithium tetraborate . 15 5.1.1 Gene
22、ral . 15 5.1.2 Principle 16 5.1.3 Reagents 16 5.1.4 Apparatus 16 5.1.5 Procedure 16 5.2 Extraction with hydrochloric acid . 16 5.2.1 General . 16 5.2.2 Principle 16 5.2.3 Reagents 16 5.2.4 Apparatus 17 5.2.5 Procedure 17 5.3 Microwave digestion with nitric acid 17 5.3.1 General . 17 5.3.2 Principle
23、17 5.3.3 Reagents 17 5.3.4 Apparatus 17 5.3.5 Procedure 18 5.4 Pressurized digestion with nitric acid 18 5.4.1 General . 18 5.4.2 Principle 18 BS EN 12485:2017EN 12485:2017 (E) 3 5.4.3 Reagent . 18 5.4.4 Apparatus 18 5.4.5 Procedure 18 6 Conventional methods of determining major and minor constituen
24、ts 19 6.1 Determination of free water . 19 6.1.1 General . 19 6.1.2 Principle . 19 6.1.3 Apparatus 19 6.1.4 Procedure 19 6.1.5 Expression of results . 20 6.2 Loss on ignition at 550 C . 20 6.2.1 General . 20 6.2.2 Principle . 20 6.2.3 Apparatus 20 6.2.4 Procedure 20 6.2.5 Expression of results . 20
25、6.3 Determination of carbon dioxide 21 6.3.1 General . 21 6.3.2 Principle . 21 6.3.3 Apparatus 21 6.3.4 Procedure 21 6.3.5 Expression of results . 21 6.4 Determination of residue insoluble in hydrochloric acid 22 6.4.1 General . 22 6.4.2 Principle . 22 6.4.3 Reagents . 22 6.4.4 Apparatus 22 6.4.5 Pr
26、ocedure 22 6.4.6 Expression of results . 22 6.5 Determination of content of water soluble calcium oxide or calcium hydroxide (reference method) 23 6.5.1 General . 23 6.5.2 Principle . 23 6.5.3 Reagents . 23 6.5.4 Apparatus 23 6.5.5 Procedure 23 6.5.6 Expression of results . 24 6.6 Determination of s
27、ugar soluble calcium oxide or calcium hydroxide (alternative method) 25 6.6.1 General . 25 6.6.2 Principle . 25 6.6.3 Reagents . 25 6.6.4 Apparatus 25 6.6.5 Procedure 26 6.6.6 Sugar extraction 26 6.6.7 Determination 26 6.6.8 Expression of results . 26 6.7 Water-insoluble matter 26 6.7.1 General . 26
28、 6.7.2 Principle . 27 6.7.3 Apparatus 27 6.7.4 Procedure 27 BS EN 12485:2017EN 12485:2017 (E) 4 6.7.5 Expression of results . 27 6.8 Determination of free CaO 27 6.8.1 General . 27 6.8.2 Principle 28 6.8.3 Reagents 28 6.8.4 Apparatus 28 6.8.5 Procedure 28 6.8.6 Expression of results . 28 6.9 Determi
29、nation of calcium oxide and magnesium oxide . 28 6.9.1 General . 28 6.9.2 Principle 29 6.9.3 Reagents 29 6.9.4 Apparatus 30 6.9.5 Procedure 30 6.9.6 Expression of results . 31 6.10 Determination of sulfate 31 6.10.1 General . 31 6.10.2 Principle 31 6.10.3 Reagents 32 6.10.4 Apparatus 32 6.10.5 Proce
30、dure 32 6.10.6 Expression of results . 33 6.11 Determination of solubility index by conductivity 33 6.11.1 General . 33 6.11.2 Principle 33 6.11.3 Reagents 33 6.11.4 Apparatus 34 6.11.5 Procedure 34 6.11.6 Evaluation . 35 6.12 Calculation of the composition of a commercial product 36 6.12.1 General
31、. 36 6.12.2 Calculations 36 7 Determination of constituents by modern techniques 38 7.1 Determination of minor constituents by AAS flame technique . 38 7.1.1 General . 38 7.1.2 Reagents 39 7.1.3 Apparatus 40 7.1.4 Interferences . 40 7.1.5 Procedure 40 7.1.6 Calculation and expression of results . 41
32、 7.2 Determination of major and minor constituents by ICP-OES. 42 7.2.1 General . 42 7.2.2 Reagents 43 7.2.3 Apparatus 43 7.2.4 Spectral interferences 44 7.2.5 Non spectral interferences . 45 7.2.6 Methods of eliminating or reducing interferences 45 7.2.7 Procedure 45 7.2.8 Calculation and expressio
33、n of results . 46 8 Determination of chemical parameters . 47 8.1 Determination of lead, cadmium, chromium and nickel by AAS graphite tube technique. 47 BS EN 12485:2017EN 12485:2017 (E) 5 8.1.1 General . 47 8.1.2 Reagents . 48 8.1.3 Apparatus 49 8.1.4 Interferences 49 8.1.5 Procedure 50 8.1.6 Calcu
34、lation and expression of results . 50 8.2 Determination of lead, cadmium, chromium and nickel by ICP-OES . 53 8.2.1 General . 53 8.2.2 Reagents . 53 8.2.3 Apparatus 54 8.2.4 Spectral interferences . 54 8.2.5 Non spectral interferences 55 8.2.6 Methods of eliminating or reducing interferences . 55 8.
35、2.7 Procedure 55 8.2.8 Calculation and expression of results . 56 8.3 Determination of arsenic, antimony and selenium by AAS hydride technique . 57 8.3.1 General . 57 8.3.2 Reagents . 57 8.3.3 Apparatus 58 8.3.4 Interferences 58 8.3.5 Procedure 59 8.3.6 Expression of results . 60 8.4 Determination o
36、f mercury by cold-vapour technique 60 8.4.1 General . 60 8.4.2 Reagents . 61 8.4.3 Apparatus 61 8.4.4 Interferences 62 8.4.5 Procedure 62 8.4.6 Expression of results . 63 Annex A (informative) Analytical scheme . 64 Annex B (informative) Precision data for the test methods . 71 Bibliography . 73 BS
37、EN 12485:2017EN 12485:2017 (E) 6 European foreword This document (EN 12485:2017) 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 identic
38、al text or by endorsement, at the latest by January 2018, and conflicting national standards shall be withdrawn at the latest by January 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for i
39、dentifying any or all such patent rights. This document supersedes EN 12485:2010. Significant technical differences between this edition and EN 12485:2010 are as follows: a) addition of test procedures for dolomitic lime (see 3.2); b) the description for air-jet sieving was revised (see 4.1); c) upd
40、ate of abbreviations to be in accordance with ISO 80000-9 Quantities and units Part 9: Physical chemistry and molecular physics. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria,
41、Belgium, Bulgaria, 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, Serbia, Slovakia, Slovenia, Spain, Sw
42、eden, Switzerland, Turkey and the United Kingdom. BS EN 12485:2017EN 12485:2017 (E) 7 1 Scope This European Standard specifies the methods used for the chemical analyses and the determination of physical properties of calcium carbonate, high-calcium lime, half-burnt dolomite, magnesium oxide, calciu
43、m magnesium carbonate and dolomitic lime used to treat water for human consumption. This document specifies the reference methods and, in certain cases, an alternative method which can be considered to be equivalent. Any other methods may be used provided they are calibrated, either against the refe
44、rence methods or against internationally accepted reference materials, in order to demonstrate their equivalence. 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
45、 edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 459-2, Building lime - Part 2: Test methods EN 1017, Chemicals used for treatment of water intended for human consumption - Half-burnt dolomite EN 1018, Chemicals used
46、 for treatment of water intended for human consumption Calcium carbonate EN 12518, Chemicals used for treatment of water intended for human consumption - High-calcium lime EN 16003, Chemicals used for treatment of water intended for human consumption - Calcium magnesium carbonate EN 16004, Chemicals
47、 used for treatment of water intended for human consumption - Magnesium oxide EN 16409, Chemicals used for treatment of water intended for human consumption - Dolomitic lime EN ISO 3696:1995, Water for analytical laboratory use - Specification and test methods (ISO 3696:1987) ISO 3165, Sampling of c
48、hemical products for industrial use Safety in sampling ISO 4793:1980, Laboratory sintered (fritted) filters Porosity grading, classification and designation 3 General requirements 3.1 Number of determinations Two analyses shall be carried out to determine the various constituents (see Clause 5 to Cl
49、ause 8; see also 3.6). BS EN 12485:2017EN 12485:2017 (E) 8 3.2 Methods for analysis The methods to be used for the analysis of half-burnt dolomite, calcium carbonate, high calcium lime, magnesium oxide, calcium magnesium carbonate and dolomitic lime and the principle of each method are listed in Table 1. Schematic diagrams of the analyses are given in Annex A (Figures A.1 to A.7). The requirement values for free MgO and free Mg(OH)2in half-burnt dolomite shall be expressed as free MgO in accordance with EN 1017. The same requirement is rela
