1、BRITISH STANDARDBS EN 12873-3:2006Influence of materials on water intended for human consumption Influence due to migration Part 3: Test method for ion exchange and adsorbent resinsThe European Standard EN 12873-3:2006 has the status of a British StandardICS 13.060.20; 67.250g49g50g3g38g50g51g60g44g
2、49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 12873-3:2006This British Standard was published under the authority of the Standards Policy and Strategy Committeeon 2
3、8 April 2006 BSI 2006ISBN 0 580 48105 0National forewordThis British Standard is the official English language version of EN 12873-3:2006. The UK participation in its preparation was entrusted to Technical Committee EH/6, Effects of materials on water quality, which has the responsibility to: aid en
4、quirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.A list of organizations repr
5、esented on this committee can be obtained on request to its secretary.Cross-referencesThe British 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”,
6、 or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.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 im
7、munity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Da
8、te CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 12873-3March 2006ICS 13.060.20; 67.250English VersionInfluence of materials on water intended for human consumption- Influence due to migration - Part 3: Test method for ionexchange and adsorbent resinsInfluence des matriaux sur leau desti
9、ne laconsommation humaine - Influence due la migration -Partie 3 : Mthode dessai des rsines absorbantes etchangeuses dionsEinfluss von Materialien auf Wasser fr den menschlichenGebrauch - Einfluss infolge der Migration - Teil 3:Prfverfahren fr Ionenaustauscher und AdsorberharzeThis European Standard
10、 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 EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such
11、nationalstandards 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 translationunder the responsibility of a CEN member into its own language and n
12、otified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherl
13、ands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in an
14、y form and by any means reservedworldwide 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 definitions5 3 Principle6 4 Reagents.6 4.1 General6 4.2 Cleaning liquids for glassware6 5 Apparatus .7 6 Test samples 7 7
15、 Pretreatment of test samples 7 8 Test procedure .7 8.1 General7 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 diagram11 Annex B (informative) Test apparatus .12 Annex C (informative) Resin pre
16、-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 given the status of a national standard, either by publication of an identical
17、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 support the appropriate standards. It has been drawn up with the objective to d
18、escribe 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 steps in the test procedure. Annex B, describes a test apparatus. Annex C,
19、 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 method for non-metallic and non-cementitious factory made products; Part 2 Te
20、st 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 Regulations, the national standards organizations of the following countries are b
21、ound 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, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerla
22、nd 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 adoption of verifiable European acceptance criteria, the relevant national reg
23、ulations 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 intended for human consumption. Resins comprise synthetic organic macromolecular
24、 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 state. Adsorbent resins: used to lower the concentration of undesirable subs
25、tances (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 consists of the determination of one or more characteristics of a given product. 2
26、.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 material, in its finished form that comes into contact with water 2.6 test
27、 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 without contact with the test sample. EN 12873-3:2006 (E) 6 2.9 migration mov
28、ement 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-exchange resin process in which a specific chemical solution is passed throug
29、h 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 amount of ions from the resin bed to simulate an accelerated service run 2.13
30、 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 subjected to pretreatment procedures according to the manufacturers instruct
31、ions. 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 reagents of analytical grade shall be used, except where specified otherwis
32、e. 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. The use of procedural blanks and laboratory blanks assists in detecting any c
33、ontamination 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 distillation, followed by activated carbon filtration. 4.2 Cleaning liquids f
34、or 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 0,01) l of test water (4.1). EN 12873-3:2006 (E) 7 NOTE Care is needed becaus
35、e 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 0,01) l of test water (4.1). NOTE Care is needed because the solution may
36、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 material PTFE should only be used when there is a small contact area with the tes
37、t 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 test apparatus at (23 2) C. 5.4 Laboratory glassware, cleaned by washing w
38、ith 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 representative sample of the resin shall be taken and treated according to manufactur
39、ers 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 the test apparatus. 8 Test procedure 8.1 General The temperature shall be ma
40、intained 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 carried out on a product will be specified in national or other regulations.
41、 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 containing test water (see annex B) ensuring that the test water level does not fal
42、l 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 volumes per hour. NOTE Resins are normally supplied wet. If not then the resins
43、 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 the bed of resin. 8.2.3 Start the flow of test water through the column at
44、 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. 8.2.5 Start the flow of test water through the column at a rate of (5 0,5)
45、 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 the flow of test water through the column at a rate of (5 0,5) bed volumes p
46、er 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 blanks Prior to adding the resin, add test water (500 5) ml to the test appa
47、ratus. 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 Calculation of test results Determine the concentration of analyte C1, C2and C3m
48、g/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 of analyte. Convert the concentrations C*1, C*2and C*3to R1, R2and R3mg/l we
49、t 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 volume 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 add
