1、BRITISH STANDARD BS EN 1302:1999 Incorporating Corrigendum No. 1 Chemicals used for treatment of water intended for human consumption Aluminium-based coagulants Analytical methods The European Standard EN 1302:1999 has the status of a British Standard ICS 71.100.80 BS EN 1302:1999 This British Stand
2、ard, 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 September 1999 BSI 2 October 2002 ISBN 0 580 32747 7 National foreword This British Standard is the English lang
3、uage version of EN 1302:1999, including Corrigendum February 2002. The UK participation in its preparation was entrusted to Technical Committee CII/59, Chemicals for drinking water treatment, which has the responsibility to: aid enquirers to understand the text; present to the responsible European c
4、ommittee 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 organizations represented on this committee can be obtained on request to its secretary. Additio
5、nal information Article 8 of the Council 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 admissable
6、concentrations prescribed in Annex 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 us
7、e to chemicals which are authorized 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 Br
8、itish Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue of or British Standards O
9、nline. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its 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
10、inside front cover, pages i and ii, the EN title page, pages 2 to 43 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 13809 Corrigendum No. 1 2 October 2002 Changes to Clause
11、4, A.4.6.1, A.4.6.2, A.11.6.1, A.11.6.2 and A.12.6.2EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1302 April 1999 ICS 71.100.80 Incorporating corrigendum February 2002 English version Chemicals used for treatment of water intended for human consumption Aluminium-based coagulants Analytical me
12、thods Produits chimiques utiliss pour le traitement de leau destine la consommation humaine Coagulants base daluminium Mthodes danalyse Produkte zur Aufbereitung von Wasser fr den menschilichen Gebrauch Flockungsmittel auf Aluminiumbasis Analytische Methoden This European Standard was approved by CE
13、N on 1 April 1999. CEN members 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 m
14、ay be obtained on application to the Central Secretariat 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 Ce
15、ntral Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United King
16、dom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref. No. EN 1302:1999 EE
17、N 1302:1999 BSI 2 October 2002 2 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 end
18、orsement, at the latest by October 1999, and conflicting national standards shall be withdrawn at the latest by October 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Bel
19、gium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1S c o p e 3 2 Normative references 3 3 Preparation of the test sample 4 4M e t h o d s o f
20、 a n a l y s i s 4 5 Expression of results 5 Annex A (normative) Reference methods of analysis 6 Annex B (informative) Routine methods 41 Annex C (informative) Bibliography 43 Figure A.1 Calculation of the iron concentration in the test solution 12 Figure A.2 Calculation of the iron concentration in
21、 the blank solution 13 Figure A.3 Calculation of the sodium concentration in the test solution 18 Figure A.4 Calculation of the sodium concentration in the blank solution 18 Figure A.5 Calculation of the calcium concentration in the test solution 21 Figure A.6 Calculation of the calcium concentratio
22、n in the blank solution 21 Figure A.7 Calculation of the metal concentration in the test solution 36 Figure A.8 Calculation of the metal concentration in the blank solution 36 Table 1 Methods of analysis 4 Table 2 Applicability methods of analysis 5 Table A.1 Aliquot portion V 1for Al determination
23、(EDTA method) 7 Table A.2 Aliquot portion V 1for Al determination (CDTA method) 9 Table A.3 Dilutions and aliquot portion V 3 for Cl determination 23 Table A.4 Aliquot portion V 1for determination 24 Table A.5 Dilutions and aliquot portion V 5for silicate determination 26 Table A.6 Aliquot portion V
24、 1for free acidity, titrimetric method 27 Table A.7 Aliquot portion for basicity, titrimetric oxalate method 29 Table A.8 Aliquot portion V 1for basicity titrimetric KF method 32 Table B.1 41 Table B.2 42 SO 2 4EN 1302:1999 BSI 2 October 2002 3 1 Scope This European Standard is applicable to alumini
25、um-based coagulants used for treatment of water intended for human consumption. It specifies analytical methods to be used for products described in EN 878, EN 881, EN 882, EN 883, prEN 885, prEN 886, prEN 887 and prEN 935. 2 Normative references This European Standard incorporates by dated or undat
26、ed 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 or revisions of any of these publications apply to this European Standard only when i
27、ncorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 878, Chemicals used for treatment of water intended for human consumption Aluminium sulfate. EN 881, Chemicals used for treatment of water intended for human consumption A
28、luminium chloride, aluminium chloride hydroxide and aluminium chloride hydroxide sulfate (monomeric). EN 882, Chemicals used for treatment of water intended for human consumption Sodium aluminate. EN 883, Chemicals used for treatment of water intended for human consumption Polyaluminium chloride hyd
29、roxide and polyaluminium chloride hydroxide sulfate. prEN 885, Chemicals used for treatment of water intended for human consumption Polyaluminium chloride hydroxide silicate. prEN 886, Chemicals used for treatment of water intended for human consumption Polyaluminium hydroxide silicate sulfate. prEN
30、 887, Chemicals used for treatment of water intended for human consumption Aluminium-iron (III) sulfate. prEN 935, Chemicals used for treatment of water intended for human consumption Aluminium-iron (III) chloride and aluminium-iron (III) chloride hydroxide (monomeric). EN ISO 3696, Water for analyt
31、ical use Specification and test methods. (ISO 3696:1987) ISO 5666-1:1983, Water quality Determination of total mercury by flameless atomic absorption spectrometry Part 1: Method after digestion with permanganate-peroxodisulfate ISO 5725-2, Accuracy (trueness and precision) of measurement methods and
32、 results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method. ISO 6206:1979, Chemical products for industrial use Sampling Vocabulary. ISO 6227:1982, Chemical products for industrial use General method for determination of chloride ions Po
33、tentiometric method. ISO 6382:1981, General method for determination of silicon content Reduced molybdosilicate spectrophotometric method.EN 1302:1999 4 BSI 2 October 2002 3 Preparation of the test sample 3.1 Definitions For the purposes of this European Standard, the following definitions apply. 3.
34、1.1 laboratory sample sample as prepared for sending to the laboratory and intended for inspection or testing ISO 6206:1979 3.1.2 test sample sample prepared from the laboratory sample and from which test portions will be taken ISO 6206:1979 3.1.3 test portion quantity of material drawn from the tes
35、t sample (or from the laboratory sample if both are the same) and on which the test or observation is actually carried out ISO 6206:1979 3.2 Procedure From the laboratory sample, prepare the test sample by grinding the solid samples until particle size is below 2,5 mm and homogenizing, and homogeniz
36、e the liquid samples. 4 Methods of analysis The methods to be used for analysis of aluminium-based coagulants and the principles of each method are listed in Table 1 and described in full in Annex A for reference methods and in Annex B for routine methods. The methods which are applicable to only so
37、me of the products described in EN 878, EN 881, EN 882, prEN 885, prEN 886, prEN 887 and prEN 935 are listed in Table 2. Table 1 Methods of analysis Determination Method Principle Aluminium A.1 a EDTA complexometric titration with EDTA Aluminium A.2 Separation of iron, CDTA complexometric titration
38、Iron A.3 Atomic absorption spectrometry (flame) Iron A.4 Potentiometric titration Sodium A.5 Atomic absorption spectrometry (flame) Calcium A.6 Atomic absorption spectrometry (flame) Chloride A.7 Potentiometric titration Sulfate A.8 Barium sulfate gravimetry Silicate A.9 Reduced molybdosilicate spec
39、trophotometry Free acidity A.10 Acidimetric titration Basicity A.11 Acidimetric titration, oxalate method Basicity A.12 Acidimetric titration, KF method Insoluble matter A.13 Gravimetry Arsenic A.15 Inductively coupled plasma optical emission spectrometry (ICP/OES) (hydride) Cadmium A.14 Inductively
40、 coupled plasma optical emission spectrometry (ICP/OES) Chromium A.14 Inductively coupled plasma optical emission spectrometry (ICP/OES) Mercury A.16 Atomic absorption spectrometry (flameless) Nickel A.14 Inductively coupled plasma optical emission spectrometry (ICP/OES) Lead A.14 Inductively couple
41、d plasma optical emission spectrometry (ICP/OES) Antimony A.15 Inductively coupled plasma optical emission spectrometry (ICP/OES) (hydride) Selenium A.15 Inductively coupled plasma optical emission spectrometry (ICP/OES) (hydride) a Only applicable for determination of aluminium in EN 881 for low ir
42、on grades or other grades.EN 1302:1999 BSI 2 October 2002 5 Table 2 Applicability methods of analysis NOTE The method given in B.2 should only be used for determination of basicity by calculation method in EN 883, prEN 885 and prEN 886. 5 Expression of results 5.1 Aluminium content The aluminium con
43、tent shall be expressed as Al. The following equation gives the aluminium content expressed as alumina (Al 2 O 3 ): 5.2 Repeatability Each laboratory shall calculate the repeatability of the method under their laboratory conditions according to the procedure defined in ISO 5725-2. EN/prEN 878 881 88
44、2 883 885 886 887 935 Aluminium A.1/A . 2A . 2A . 1A . 2A . 2A . 2A . 2A . 2 Aluminium Fe/Al 0,01 % (m/m) A.1 A.1 A.1 A.1 A.1 Iron A.3/A . 4A . 3A . 3A . 3A . 3A . 3A . 4A . 4 Sodium A.5 A.5 Calcium A.6 A.6 A.6 Chloride A.7 A.7 A.7 A.7 Sulfate A.8 A.8 A.8 A.8 A.8 Silicate A.9 A.9 Free acidity A.10 A
45、.10 A.10 A.10 Basicity Oxalate method A.11 A.11 A.11 A.11 A.11 A.11 Basicity KF method A.12 A.12EN 1302:1999 6 BSI 2 October 2002 Annex A (normative) Reference methods of analysis A.1 Determination of aluminium (EDTA complexometric method) A.1.1 General This method is applicable for the determinatio
46、n of aluminium in aluminium-based coagulants used for treatment of water intended for human consumption: as the reference method for products described in EN 878 (iron free grade) and EN 882; as a routine method for products described in EN 878 (low iron grade), EN 881, EN 883, prEN 885, prEN 886 an
47、d prEN 935 containing no more than 10 g of Fe per kilogram of aluminium. A.1.2 Principle Dissolution in water, in the case of solid products, or dilution with water in the case of products in solution, of a test sample. Complexation of aluminium, in a hot acidic medium with an excess of ethylenediam
48、inetetraacetic acid (EDTA) solution. Titration of the excess EDTA with a standard volumetric solution of zinc in the presence of xylenol orange as indicator. Al 3+ +EDTA 4 AlEDTA Zn 2+ +E D TA 4 ZnEDTA 2 A.1.3 Reagents All reagents shall be of a recognized analytical grade and the water used shall c
49、onform to grade 3 in accordance with EN ISO 3696. A.1.3.1 Sodium acetate solution, 80 g/l. A.1.3.2 Sodium hydroxide solution, 100 g/l. A.1.3.3 Hydrochloric acid Dilute one volume of hydrochloric acid ( = 1,19 g/ml) with one volume of water. A.1.3.4 Hydrochloric acid, 36,5 g/l, c(HCl) = 1 mol/l. A.1.3.5 Disodium ethylenediaminetetraacetate dihydrate
