1、 DEUTSCHE NORMJune 2006DIN EN 12873-3 ICS 13.060.20; 67.250 Influence of materials on water intended for human consumption Influence due to migration Part 3: Test method for ion exchange and adsorbent resins English version of DIN EN 12873-3:2006-06 Einfluss von Materialien auf Wasser fr den menschl
2、ichen Gebrauch Einfluss infolge der Migration Teil 3: Prfverfahren fr Ionenaustauscher und Adsorberharze Englische Fassung DIN EN 12873-3:2006-06 Document comprises 15 pages No part of this standard may be reproduced without prior permission of DIN Deutsches Institut fr Normung e. V., Berlin. Beuth
3、Verlag GmbH, 10772 Berlin, Germany, has the exclusive right of sale for German Standards (DIN-Normen). English price group 9 www.din.de www.beuth.de !,o-I“10.06 9761038DIN EN 12873-3:2006-06 2 National foreword This standard has been prepared by CEN/TC 164 Water supply (Secretariat: France), Working
4、 Group WG 3 Effect of materials in contact with drinking water (lead-managed by: the Netherlands). The responsible German body involved in its preparation was the Normenausschuss Wasserwesen (Water Practice Standards Committee), Technical Committee NA 119-04-01-01 UA Werkstoffe und Bauteile (Bedarfs
5、-gegenstnde) in Kontakt mit Trinkwasser. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12873-3 March 2006 ICS 13.060.20; 67.250 English Version Influence of materials on water intended for human consumption - Influence due to migration - Part 3: Test method for ion exchange and adsorbent resi
6、ns Influence des matriaux sur leau destine la consommation humaine - Influence due la migration - Partie 3 : Mthode dessai des rsines absorbantes et changeuses dions Einfluss von Materialien auf Wasser fr den menschlichen Gebrauch - Einfluss infolge der Migration - Teil 3: Prfverfahren fr Ionenausta
7、uscher und Adsorberharze This European Standard was approved by CEN on 23 January 2006. 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 list
8、s 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 three official versions (English, French, German). A version in any other language made by translation under the respon
9、sibility 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 Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Irelan
10、d, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart,
11、36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12873-3:2006: EEN 12873-3:2006 (E) 2 Contents Page Foreword 3 Introduction . 4 1 Scope 5 2 Terms and definitions 5 3 Principle 6 4 Reagents . 6 4.1 General 6 4
12、.2 Cleaning liquids for glassware. 6 5 Apparatus . 7 6 Test samples 7 7 Pretreatment of test samples7 8 Test procedure . 7 8.1 General 7 8.2 Preparation of leachate sample 8 8.3 Procedural blanks 8 8.4 Analysis 8 9 Calculation of test results . 9 10 Test report 9 Annex A (informative) Flow diagram .
13、 11 Annex B (informative) Test apparatus. 12 Annex C (informative) Resin pre-treatment 13 EN 12873-3:2006 (E) 3 Foreword This document (EN 12873-3:2006) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standard shall be give
14、n the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2006, and conflicting national standards shall be withdrawn at the latest by September 2006. This draft will result in one of a series of standards on test methods which supp
15、ort the appropriate standards. It has been drawn up with the objective to describe a test method to determine the migration of substances from ion exchange and absorbent resins. Evaluation of the efficiency of resins, in removing contaminants, is not included. Annex A, provides a flow diagram of the
16、 steps in the test procedure. Annex B, describes a test apparatus. Annex C, provides information on resin pre-treatment. This draft standard is the third in a series of standards dealing with the influence of migration from materials on water intended for human consumption, including: Part 1 Test me
17、thod for non-metallic and non-cementitious factory made products; Part 2 Test method for non-metallic and non-cementitious site-applied materials; Part 3 Test method for ion exchange and adsorbent resins; Part 4 Test method for water treatment membranes. According to the CEN/CENELEC Internal Regulat
18、ions, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norw
19、ay, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 12873-3:2006 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption caused by materials, it is to be remembered that, while awaiting the ado
20、ption of verifiable European acceptance criteria, the relevant national regulations remain in force. EN 12873-3:2006 (E) 5 1 Scope This European Standard specifies a procedure to determine the migration of substances from ion exchange and adsorbent resin materials for use in contact with water inten
21、ded for human consumption. Resins comprise synthetic organic macromolecular materials. The standard is applicable to resins of the following types: Ion exchange resins: used to modify the composition of water (e.g. softening by removal of calcium ions). They can be in either an anionic or cationic s
22、tate. Adsorbent resins: used to lower the concentration of undesirable substances (usually organic pollutants) from water. They are used in a neutral state. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 test technical operation that consist
23、s of the determination of one or more characteristics of a given product. 2.2 test procedure specified technical method for performing a test 2.3 test report document that presents test results and other information relevant to a test 2.4 testing laboratory laboratory that performs tests 2.5 product
24、 material, in its finished form that comes into contact with water 2.6 test sample sample of a product submitted for testing 2.7 test water water for migration testing (4.1) 2.8 blank water test water (4.1) which has been kept at the same specified conditions as migration water (see clause 8) but wi
25、thout contact with the test sample. EN 12873-3:2006 (E) 6 2.9 migration movement of a substance or substances from a test sample into the test water 2.10 bed volume volume in litres of wet resin, tapped to a constant volume, used in the test 2.11 regeneration part of the operating cycle of an ion-ex
26、change resin process in which a specific chemical solution is passed through the resin bed to prepare it for a service run 2.12 exhaustion process in which a specific chemical solution is passed through the regenerated ion exchange resin bed to exchange the ions in this solution for an equivalent am
27、ount of ions from the resin bed to simulate an accelerated service run 2.13 disinfection procedure, normally using chemicals, such as sodium hypochlorite or peracetic acid, carried out on a resin to inactivate microorganisms 3 Principle If relevant, at the beginning of the test, the test sample is s
28、ubjected to pretreatment procedures according to the manufacturers instructions. The test sample is brought into contact with test water during a static/dynamic procedure carried out at (23 2) C. Test water samples are collected for analysis after contact with the resin. 4 Reagents 4.1 General Only
29、reagents of analytical grade shall be used, except where specified otherwise. All reagents shall be of sufficient purity to ensure that they do not give rise to interferences during the analysis of the extracts. NOTE Contamination can arise from various sources, e.g. plastics or rubber materials. Th
30、e use of procedural blanks and laboratory blanks assists in detecting any contamination and identifying its source. The test water shall be chlorine free water with a conductivity of 20 S/cm at 25 C and a total organic content (TOC) of 0,2 mg/l C, e.g. prepared by reverse osmosis, deionization or di
31、stillation, followed by activated carbon filtration. 4.2 Cleaning liquids for glassware 4.2.1 hydrochloric acid, concentrated (30 % mass per volume) analytical reagent grade. 4.2.2 hydrochloric acid solution, prepared by slowly adding (0,5 0,01) l of concentrated hydrochloric acid (4.2.1) to (0,5 0,
32、01) l of test water (4.1). EN 12873-3:2006 (E) 7 NOTE Care is needed because the solution may generate heat. 4.2.3 nitric acid, concentrated (65 % mass per volume) analytical reagent grade. 4.2.4 nitric acid solution, prepared by slowly adding (0,5 0,01) l of concentrated nitric acid (4.2.3) to (0,5
33、 0,01) l of test water (4.1). NOTE Care is needed because the solution may generate heat. 5 Apparatus 5.1 Vessels, containers, stoppers and connections, consisting of a material, such as glass, PTFE or stainless steel, that is inert under the specified test conditions (see clause 8). NOTE The materi
34、al PTFE should only be used when there is a small contact area with the test water. Thus PTFE is unsuitable for containers 5.2 Test apparatus. An example testing arrangement is given in annex B. 5.3 Temperature control facility, such as a temperature-controlled laboratory, capable of maintaining the
35、 test apparatus at (23 2) C. 5.4 Laboratory glassware, cleaned by washing with a biodegradable laboratory detergent, followed by rinsing with either hydrochloric acid solution (4.2.2) or nitric acid solution (4.2.4) and finally by thoroughly rinsing with test water (4.1). 6 Test samples A representa
36、tive sample of the resin shall be taken and treated according to manufacturers instructions. 7 Pretreatment of test samples Exhaustion/regeneration of wet resins, if relevant, shall be carried out according to manufacturers instructions (see annex C). Do not carry out any regeneration procedure in t
37、he test apparatus. 8 Test procedure 8.1 General The temperature shall be maintained at (23 2) C throughout. NOTE 1 The actual number of leachate samples to be taken, their analysis and assessment will be specified in national or other regulations. NOTE 2 Whether single or multiple testing is to be c
38、arried out on a product will be specified in national or other regulations. The method assumes single testing. EN 12873-3:2006 (E) 8 8.2 Preparation of leachate sample 8.2.1 Measure (500 5) ml of tapped resin (see 2.10), after any pretreatment if relevant, and add slowly to the glass column containi
39、ng test water (see annex B) ensuring that the test water level does not fall below the level of the bed of resin. Ensure that there are no air spaces in the bed. Connect to the test water vessel (see annex B) and pass (20 0,5) bed volumes of test water through the column at a rate of (10 1) bed volu
40、mes per hour. NOTE Resins are normally supplied wet. If not then the resins should be added to the column as a slurry in test water in order to overcome problems of wetting and air entrainment. 8.2.2 Leave to stand for 24 h in the absence of light with the test water level (20 5) mm above the top of
41、 the bed of resin. 8.2.3 Start the flow of test water through the column at a rate of (5 0,5) bed volumes per hour. Pass and collect the first 3 bed volumes (water sample T1). 8.2.4 Leave to stand for 24 h in the absence of light with the test water level (20 5) mm above the top of the bed of resin.
42、 8.2.5 Start the flow of test water through the column at a rate of (5 0,5) bed volumes per hour. Pass and collect the first 3 bed volumes (water sample T2). 8.2.6 Leave to stand for 24 hours in the absence of light with the test water level (20 5) mm above the top of the bed of resin. 8.2.7 Start t
43、he flow of test water through the column at a rate of (5 0,5) bed volumes per hour. Pass and collect the first 3 bed volumes (water sample T3). To prevent air getting into the bed ensure that the test water level does not fall below 20 mm above the bed during the flow of test water. 8.3 Procedural b
44、lanks Prior to adding the resin, add test water (500 5) ml to the test apparatus. Carry out step 8.2.1 with no resin. Collect the 24 h stored test water (sample B). 8.4 Analysis The analyses to be carried out on the samples will be specified in the relevant regulations. EN 12873-3:2006 (E) 9 9 Calcu
45、lation of test results Determine the concentration of analyte C1, C2and C3mg/l in samples T1, T2, and T3respectively. Determine the concentration of analyte in the blank, B mg/l, and subtracted from C1, C2and C3to give C*1, C*2and C*3mg/l respectively, where C* is the blank-corrected concentration o
46、f analyte. Convert the concentrations C*1, C*2and C*3to R1, R2and R3mg/l wet resin respectively using the following equation: *VCVR= where R is the concentration of analyte expressed as mg/l of wet resin. C* is the blank-corrected concentration of analyte in mg/l of collected test water. V is the vo
47、lume of water collected in litres. V* is the resin bed volume in litres. 10 Test report The dated test report shall include the following information: a) general information 1) name and address of test laboratory and location where the test was carried out when different from the address of the test
48、ing laboratory; 2) unique identification of report (such as serial number) and of each page, and total number of pages of the report; 3) name and address of client; 4) description and identification of the test item; 5) proposed use of the product; 6) signature and title or an equivalent marking of
49、person(s) accepting technical responsibility for the test report and date of issue; 7) statement to the effect that the test results relate only to the items tested; 8) statement that the report shall not be reproduced except in full without the written approval of the testing laboratory; b) information on the test material 1) trade name or designation of manufactured material; 2) complete identification and date of receipt of test item and date of performance of test; 3) details of the test sampl
