1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 890:2012Chemicals used for treatment of water intended for human consumption - Iron (III) sulfate solution BS EN 890:2012 BRITISH STANDARDNational forewordThis British Stan
2、dard is the UK implementation of EN 890:2012. It supersedes BS EN 890:2004 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee CII/59, Chemicals for drinking water treatment.A list of organizations represented on this committee can be obtained on request t
3、o 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 2012. Published by BSI Standards Limited 2012ISBN 978 0 580 73046 7 ICS 13.060.20; 71.100.80 Compliance with a
4、 British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2012.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 890:2012EUROPEAN STANDARD NORME EUROPENNE EURO
5、PISCHE NORM EN 890 July 2012 ICS 71.100.80 Supersedes EN 890:2004English Version Chemicals used for treatment of water intended for human consumption - Iron (III) sulfate solution Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Sulfate de fer (III) liquide Pro
6、dukte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Eisen(III)sulfat-Lsung This European Standard was approved by CEN on 24 May 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of
7、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, French, German).
8、 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, Bulgaria, Croatia, Cy
9、prus, 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, Turkey and United K
10、ingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 890:2012: EBS EN
11、 890:2012EN 890:2012 (E) 2 Contents Page Foreword 4Introduction . 51 Scope 62 Normative references 63 Description . 63.1 Identification . 63.2 Commercial forms . 73.3 Physical properties 73.4 Chemical properties 84 Purity criteria 84.1 General 84.2 Composition of commercial product . 84.3 Impurities
12、 and main by-products . 84.4 Chemical parameters 95 Test methods 95.1 Sampling . 95.2 Analyses . 106 Labelling Transportation Storage 126.1 Means of delivery . 126.2 Labelling according to the EU Legislation 136.3 Transportation regulations and labelling 136.4 Marking . 146.5 Storage 14Annex A (info
13、rmative) General information on iron (III) sulfate solution 15A.1 Origin 15A.1.1 Raw materials . 15A.1.2 Manufacturing process . 15A.2 Quality of commercial product . 15A.3 Use 19A.3.1 Function 19A.3.2 Form in which it is used 19A.3.3 Treatment dose 19A.3.4 Means of application . 19A.3.5 Secondary e
14、ffects 19A.3.6 Removal of excess product 19Annex B (normative) Analytical methods . 20B.1 Determination of iron (III) sulfate . 20B.1.1 Total iron . 20B.1.2 Determination of iron (II) ( Fe (II) . 21B.1.3 Determination of iron (III) ( Fe (III) . 22B.2 Determination of manganese . 22B.2.1 General 22B.
15、2.2 Principle 22B.2.3 Reagents . 22B.2.4 Apparatus . 23B.2.5 Procedure . 23B.3 Determination of insoluble matters . 24B.3.1 General 24B.3.2 Principle 24B.3.3 Reagents . 24BS EN 890:2012EN 890:2012 (E) 3 B.3.4 Apparatus . 24B.3.5 Procedure . 25B.3.6 Calculation . 25B.3.7 Precision . 25B.4 Determinati
16、on of free acid 25B.4.1 General 25B.4.2 Principle 25B.4.3 Interferences 26B.4.4 Reagents . 26B.4.5 Apparatus . 26B.4.6 Procedure . 26B.4.7 Calculation . 26B.5 Determination of arsenic, antimony and selenium by hydride generation atomic absorption spectrometry (AAS) . 27B.5.1 General 27B.5.2 Principl
17、e 27B.5.3 Reagents . 27B.5.4 Apparatus . 28B.5.5 Procedure . 28B.6 Determination of mercury by cold vapour atomic absorption spectrometry (AAS) . 30B.6.1 General 30B.6.2 Principle 31B.6.3 Reagents . 31B.6.4 Apparatus . 31B.6.5 Procedure . 32B.7 Determination of cadmium, chromium, nickel and lead by
18、graphite furnace atomic absorption spectrometry (AAS) . 32B.7.1 General 32B.7.2 Principle 33B.7.3 Reagents . 33B.7.4 Apparatus . 33B.7.5 Procedure . 34Annex C (informative) Reduction of Fe (III) on a silver column 36C.1 General 36C.2 Principle 36C.3 Reagents . 36C.4 Apparatus . 36C.5 Procedure . 36C
19、.5.1 Preparation of the silver powder 36C.5.2 Reduction of Fe (III) . 37Annex D (informative) Determination of cadmium, chromium, nickel and lead (inductively coupled plasma optical emission spectrometry (ICP/OES) 38D.1 General 38D.2 Principle 38D.3 Reagents . 38D.4 Apparatus . 39D.5 Procedure . 39D
20、.5.1 Spectrometer settings . 39D.5.2 Calibration, measurement and calculation of the elements cadmium, chromium, nickel and lead 39Annex E (normative) General rules relating to safety . 40E.1 Rules for safe handling and use 40E.2 Emergency procedures . 40E.2.1 First aid . 40E.2.2 Spillage . 40E.2.3
21、Fire 40Bibliography 41BS EN 890:2012EN 890:2012 (E) 4 Foreword This document (EN 890:2012) 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
22、an identical text or by endorsement, at the latest by January 2013, and conflicting national standards shall be withdrawn at the latest by January 2013. 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 shall not
23、be held responsible for identifying any or all such patent rights. This document supersedes EN 890:2004. Significant technical differences between EN 890:2012 and EN 890:2004 are as follows: a) change of the maximum allowed percentage of mass fraction of insoluble matter in the product from 0,3 % to
24、 0,5 % (see Table 2); b) update of the information of risk and safety labelling of the product to comply with the new regulations (see 6.2 and 2); c) change of the method for determination of iron (III) sulfate in order to avoid the use of hazardous potassium dichromate (see B.1). According to the C
25、EN/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, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hung
26、ary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 890:2012EN 890:2012 (E) 5 Introduction In respect of potential adverse effects on the quality of wa
27、ter intended for human consumption, caused by the product covered by this document: a) this document 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
28、European criteria, existing national regulations concerning the use and/or the characteristics of this product 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 cove
29、red by this document is subject to regulation or control by National Authorities. BS EN 890:2012EN 890:2012 (E) 6 1 Scope This European Standard is applicable to iron (III) sulfate solution of various iron and/or acid contents (see 3.2) used for treatment of water intended for human consumption. It
30、describes the characteristics of iron (III) sulfate solution and specifies the requirements and the corresponding analytical methods for iron (III) sulfate solution (analytical methods are given in Annex B) and gives information on its use in water treatment. It also determines the rules relating to
31、 safe handling and use of iron (III) sulfate solution (see Annex E). 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 reference
32、s, the latest edition of the referenced document (including any amendments) applies. EN 10028-7, Flat products made of steels for pressure purposes Part 7: Stainless steels EN 10088-1, Stainless steels Part 1: List of stainless steels EN ISO 3696, Water for analytical laboratory use Specification an
33、d test methods (ISO 3696) ISO 3165, Sampling of chemical products for industrial use Safety in sampling ISO 5790:1979, Inorganic chemical products for industrial use General method for determination of chloride content Mercurimetric method ISO 6206, Chemical products for industrial use Sampling Voca
34、bulary 3 Description 3.1 Identification 3.1.1 Chemical name Iron (III) sulfate, solution. 3.1.2 Synonym or common names Ferric sulfate liquor, red iron liquor. 3.1.3 Relative molecular mass 399,87. 3.1.4 Empirical formula Fe2(SO4)3. 3.1.5 Chemical formula Fe2(SO4)3. 3.1.6 CAS Registry Number 1)10028
35、-22-5. 1) Chemical Abstract Service Registry Number. BS EN 890:2012EN 890:2012 (E) 7 3.1.7 EINECS reference 2)233-072-9. 3.2 Commercial forms Different classes of solution exist varying in iron content and acidity. Examples are given in Table 1. Table 1 Different classes Classes Fe (III) Fe2(SO4)3Fr
36、ee H2SO4Density at 15 C Mass fraction in % Mass fraction c in %Mass fraction in % g/ml Class A 11,20 to 11,80 40,00 to 42,14 1,00 1,49 to 1,53 Class B 11,20 to 11,80 36,10 to 39,24 0 a1,45 to 1,47 Class C 8,40 to 8,80 30,00 to 31,43 10,00 to 11,00 1,46 to 1,48 Class D 12,50 to 12,80 44,60 to 45,70 1
37、,00 1,57 to 1,60 Class E 12,50 to 12,80 40,70 to 42,80 0 a1,52 to 1,56 Class F 13,50 to 14,00 44,78 to 47,55 0 b1,58 to 1,63 aDeficiency of SO42-, expressed as H2SO4, is a mass fraction of 3 % to 4 % of the product. bDeficiency of SO42-, expressed as H2SO4, is a mass fraction of 2,5 % to 3,5 % of th
38、e product. cFe2(SO4)3by direct stoichiometry with subtraction of calculated SO42-deficiency where appropriate on classes B, E and F. 3.3 Physical properties 3.3.1 Appearance The iron (III) sulfate solution is a red/brown solution. 3.3.2 Density See Table 1. 3.3.3 Solubility (in water) The iron (III)
39、 sulfate solution is dilutable down to about a mass fraction of 1 % of Fe2(SO4)3. Below this concentration, hydrolysis and formation of hydroxide will occur. 3.3.4 Vapour pressure Not known. 3.3.5 Boiling point at 100 kPa 3)Higher than 100 C. 3.3.6 Freezing point Lower than - 15 C. 2) European Inven
40、tory of Existing Commercial Chemical Substances. 3) 100 kPa = 1 bar. BS EN 890:2012EN 890:2012 (E) 8 3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) The viscosity of the commonly used solution varies in the range of 5 mPa.s to 130 mPa.s at 10 C. 3.3.9 Critical temperature Not applicable. 3.
41、3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties The solutions of iron (III) sulfate are acidic. 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for iron (III) sulfate solution used for the treatment of wate
42、r intended 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. Users of this prod
43、uct 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 this product s
44、tandard. Limits have been given for impurities and chemical 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 lead to significant quantities of impurities, by-products or additiv
45、es being present, this shall be notified to the user. 4.2 Composition of commercial product The product shall contain not less than a mass fraction of 30 % of Fe2(SO4)3and shall be within 3 % of the manufacturers declared values. 4.3 Impurities and main by-products The product shall conform to the r
46、equirements specified in Table 2. The concentration limits refer to Fe (III). BS EN 890:2012EN 890:2012 (E) 9 Table 2 Impurities Impurity Limit Mass fraction of Fe (III) content % Grade 1 Grade 2 Grade 3 Manganese max. 0,5 1 2 Iron (II) amax. 2,5 2,5 2,5 Insoluble matters bmax. 0,5 0,5 0,5 aFe (II)
47、has a lower coagulant efficiency compared to Fe (III). Also hydrolysis of Fe (II) starts at pH value 8, and therefore Fe (II) can remain into the water at lower pH values.bAn excess of insoluble matters indicates the presence of foreign matter (see A.2). Iron is a component of the product that will
48、usually be removed in the treatment process.4.4 Chemical parameters The product shall conform to the requirements specified in Table 3. The concentration limits are specified in milligrams per kilogram of Fe (III). Table 3 Chemical parameters Parameter Limit in mg/kg of Fe (III) Type 1 Type 2 Type 3 Arsenic (As) max. 1 20 50 Cadmium (Cd) max. 1 25 50 Chromium (Cr) max. 100 350 500 Mercury (Hg) max. 0,1 5 10 Nickel (Ni) max. 300 350 500 Lead (P
