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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 889:1999 The Europe
2、an Standard EN 889:1998 has the status of a British Standard ICS 71.100.80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Chemicals used for treatment of water intended for human consumption Iron(II) sulfate Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:12 GMT+
3、00:00 2006, Uncontrolled Copy, (c) BSI BS EN 889:1999 This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 February 1999 BSI 02-1999 ISBN 0 580 306
4、39 9 Amendments issued since publication Amd. No.DateText affected National foreword This British Standard is the English language version of EN 889:1998. The UK participation in its preparation was entrusted to Technical Committee CII/59, Chemicals for drinking water treatment, which has the respon
5、sibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organiza
6、tions represented on this committee can be obtained on request to its secretary. The United Kingdom did not support this standard at the CEN Enquiry stage and voted against its acceptance at the Formal Vote Stage. The principle UK objections were as follows. a) The limits for manganese and insoluble
7、 matter specified in Table 1 are expressed as percentages of the iron content whereas the analytical methods described in annex B give the results as mg/kg of the product and a percentage by mass of the product, respectively. Similarly, the limits for toxic substances in Table 2 are expressed as mg/
8、kg of iron(II) but the calculations described in B.4.5.4, B.5.5.4 and B.6.5.4 give the results as mg/kg of the product. b) Specifying deionized water in B.3.3.1 is inappropriate: the water should conform to grade 3 in accordance with EN ISO 3696. c) No instructions are given in B.4 for the preparati
9、on of the calibration curve for the determinations of arsenic, antimony and selenium. The standard additions technique, to which reference is made, is not relevant because any matrix interference is removed by conversion of the elements to gaseous hydrides. Additional information Article 8 of the Co
10、uncil of the European Community Directive 80/778/EEC relating to the quality of water intended for human consumption requires Member States to ensure that substances used in the preparation of drinking water do not cause any contravention of the maximum admissible concentrations prescribed in annex
11、1 to 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 which are authorized
12、 for use in public water supplies. Details of conditions of use are contained in the Secretary of States List of Approved Products published by the Drinking Water Inspectorate, Floor 2/A1, Ashdown House, 123 Victoria Street, London, SW1E 6DE. Cross-references The British Standards which implement in
13、ternational or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to inclu
14、de all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN
15、 title page, pages 2 to 13 and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart
16、 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref. No. EN 889:1998 E EUROPEAN STANDARDEN 889 NORME EUROPE ENNE EUROPA ISCHE NORM August 1998 ICS 71.100.80 Descriptors: potable water, water treatment, chemical compoun
17、ds, iron sulfates, description, physical properties, chemical properties, impurities, toxic substances, tests, labelling, storage, utilization English version Chemicals used for treatment of water intended for human consumption Iron(II) sulfate Produits chimiques utilise s pour le traitement de leau
18、 destine e a la consommation humaine Sulfate de fer (II) Produkte zur Aufbereitung von Wasser fu r den menschlichen Gebrauch Eisen (II) sulfat This European Standard was approved by CEN on 24 July 1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the con
19、ditions 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 application to the Central Secretariat or to any CEN member. This European Standard exists in thre
20、e 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Aus
21、tria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page
22、 2 EN 889:1998 BSI 02-1999 Foreword This European Standard 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 identical text or by endorseme
23、nt, at the latest by February 1999, and conflicting national standards shall be withdrawn at the latest by February 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium
24、, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Description3 3.1Identification3 3.2Commercial form
25、s3 3.3Physical properties3 3.4Chemical properties4 4Purity criteria4 4.1Composition of commercial product4 4.2Impurities and main by-products4 4.3Toxic substances4 5Test methods4 5.1Sampling4 5.2Analyses4 6Labelling Transportation Storage5 6.1Means of delivery5 6.2Risk and safety labelling according
26、 to the EU Directives5 6.3Transportation regulations and labelling5 6.4Marking5 6.5Storage5 Annex A (informative) General information on iron(II) sulfate6 Annex B (normative) Analytical methods6 Annex C (informative) Determination of cadmium, chromium, nickel and lead inductively coupled plasma opti
27、cal emission spectrometry (ICP/OES)13 Annex D (informative) Bibliography13 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 889:1998 BSI 02-1999 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commer
28、cial Chemical Substances. 3)100 kPa = 1 bar. 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 provides no information as to whether the product may be used without restriction
29、 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 product remain in force. 1 Scope This European Standard is applicable to iron(I
30、I) sulfate heptahydrate used for treatment of water intended for human consumption. It describes the characteristics of iron(II) sulfate heptahydrate and specifies the requirements and the corresponding analytical methods for iron(II) sulfate heptahydrate and gives information on its use in water tr
31、eatment. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to
32、or revisions of any of these publications apply to this European standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN ISO 3696, Water for analytical laboratory use Specification and test methods. (ISO 369
33、6:1998) 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 for industrial use Sampling techniques Solid chemical products in the form of particles varying from powders to coars
34、e lumps. 3 Description 3.1 Identification 3.1.1 Chemical name Iron(II) sulfate heptahydrate. 3.1.2 Synonym or common names Ferrous sulfate, iron vitriol, copperas, green salt. 3.1.3 Relative molecular mass 278,02. 3.1.4 Empirical formula FeSO47H2O. 3.1.5 Chemical formula FeSO47H2O. 3.1.6 CAS Registr
35、y Number1) 7782-63-0 (FeSO47H2O). 7720-78-7 (FeSO4). 3.1.7 EINECS reference2) 231-753-5 (FeSO4). 3.2 Commercial forms a) Wet crystals. b) Free-flowing crystals. 3.3 Physical properties 3.3.1 Appearance Light green crystals. 3.3.2 Density 1,9 g/cm3at 20 8C. Bulk density: commercial form a) approximat
36、ely 1 kg/dm3; commercial form b) approximately 0,8 kg/dm3. 3.3.3 Solubility (in water) The solubility of iron(II) sulfate heptahydrate is 487 g/l at 20 8C. 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3) Not applicable. 3.3.6 Melting point Melting starts at approximately 64 8C
37、, leading to decomposition. 3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) Not applicable. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 889:1998 BSI 02-1999 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pr
38、essure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties Iron(II) sulfate heptahydrate and especially solutions of iron(II) sulfate heptahydrate have acid and reducing properties. They react by oxidation or hydrolysis (depending on the pH). 4 Purity criteria Limits hav
39、e been given for impurities and toxic substances where these are likely to be present in significant quantities from the current production process and raw materials. If a change in the production process or raw materials leads to significant quantities of other impurities or by-products being prese
40、nt, this shall be notified to the user. 4.1 Composition of commercial product The product shall contain not less than 82,1 % (m/m) of FeSO47H2O i.e. not less than 16 % (m/m) of Fe. 4.2 Impurities and main by-products The product shall conform to the requirements specified in Table 1. The concentrati
41、on limits refer to iron (Fe). Table 1 Impurities Impurity Limit % (m/m) of Fe content Level 1 Level 2 Level 3 Manganesemax. 0,512 Insolubles: wet crystal formmax. 0,60,60,6 free flowing formmax. 333 NOTEAn excess of insolubles indicates the presence of foreign matter. 4.3 Toxic substances NOTEFor th
42、e purpose of this standard, toxic substances are those defined in the EU Directive 80/778/EEC of 15 July, 1980 (see D.1). The content of toxic substances shall conform to the requirements specified in Table 2. The concentration limits are specified in milligrams per kilogram of Fe(II). Table 2 Toxic
43、 substances ElementLimit mg/kg of Fe(II) Type 1Type 2Type 3 Arsenic (As)max.12050 Cadmium (Cd)max.12550 Chromium (Cr)max.100350500 Mercury (Hg)max.0,1510 Nickel (Ni)max.300350500 Lead (Pb)max.10100400 Antimony (Sb)max.102060 Selenium (Se)max.12060 NOTE Cyanides, pesticides and polycyclic aromatic hy
44、drocarbons are not relevant toxic substances as listed in EU Directive 80/778/EEC because they are not likely to be found in the raw materials. 5 Test methods 5.1 Sampling Observe the general recommendations of ISO 3165 and take account of ISO 6206. Prepare the laboratory sample(s) required by the r
45、elevant procedure described in ISO 8213. 5.2 Analyses 5.2.1 Main product Iron(II) sulfate is determined as Fe content in the test sample by titrimetry with potassium dichromate solution (see B.1). 5.2.2 Impurities 5.2.2.1 Manganese The manganese content shall be determined by flame atomic absorption
46、 spectrometry (FAAS) (see B.2). 5.2.2.2 Insoluble matter The percentage by mass % (m/m) of the insoluble matter shall be determined in accordance with the method described in B.3. 5.2.3 Toxic substances 5.2.3.1 General The contents of toxic substances shall be determined by atomic absorption spectro
47、metry (AAS). 5.2.3.2 Preparation of sample solution 5.2.3.2.1 General Oxidation and wet digestion is used to bring the samples to a stable solution. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 889:1998 BSI 02-1999 4)See D.2. 5)
48、United Nations Number. 5.2.3.2.2 Principle Oxidation with hydrogen peroxide (H2O2) followed by digestion with hydrochloric acid (HCl). 5.2.3.2.3 Reagents 5.2.3.2.3.1 Hydrochloric acid (HCl) solution, 30 % (m/m). 5.2.3.2.3.2 Hydrogen peroxide (H2O2) solution, 30 % (m/m). 5.2.3.2.4 Apparatus Ordinary
49、laboratory apparatus and glassware together with the following 5.2.3.2.4.1 Analytical balance. 5.2.3.2.4.2 Graduated cylinder, 50 ml. 5.2.3.2.4.3 Round flask with reflux condenser. 5.2.3.2.4.4 Hot plate. 5.2.3.2.4.5 Volumetric flask, 200 ml. 5.2.3.2.5 Procedure Dissolve with 20 ml of distilled water 20,0 g of the iron salt or iron solution. Add to iron(II)-samples 30 ml hydrogen peroxide solution (5.2.3.2.3.2). After adding 50 ml hydrochloric acid (5.2.3.2.3.1) boil the solution for 15 min by using a reflux conden
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