BS EN 14395-1-2004 Influence of organic materials on water intended for human consumption - Organoleptic assessment of water in storage systems - Test method《有机材料对人类生活用水的影响 储水系统中水的.pdf

1、BRITISH STANDARD BS EN 14395-1:2004 Influence of organic materials on water intended for human consumption Organoleptic assessment of water in storage systems Part 1: Test method The European Standard EN 14395-1:2004 has the status of a British Standard ICS 13.060.20; 13.060.45 BS EN 14395-1:2004 Th

2、is British Standard was published under the authority of the Standards Policy and Strategy Committee on 27 October 2004 BSI 27 October 2004 ISBN 0 580 44663 8 National foreword This British Standard is the official English language version of EN 14395-1:2004. The UK participation in its preparation

3、was entrusted to Technical Committee EH/6, Effects of materials on water quality, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publi

4、cations 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 or of British Standards Online. This publication does not purport to include all the nec

5、essary 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. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the int

6、erpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 21 and a back cover. The BSI c

7、opyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN143951 October2004 ICS13.060.20;13.060.45 Englishversion Influenceoforganicmaterialsonwaterintendedforhum

8、an consumptionOrganolepticassessmentofwaterinstorage systemsPart1:Testmethod Influencedesmatriauxorganiquessurleaudestinela consommationhumaineEvaluationorganoleptiquede leaudanslessystmesdestockagePartie1:Mthode dessai EinflussvonorganischenWerkstoffenaufWasserfrden menschlichenGebrauchOrganoleptis

9、chePrfungvon WasserinSpeichersystemenTeil1:Prfverfahren ThisEuropeanStandardwasapprovedbyCENon8August2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliog

10、raphicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedt

11、otheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Sl

12、ovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN143951:20

13、04:EEN 14395-1:2004 (E) 2 Contents page Foreword4 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms and definitions .6 4 Principle8 5 Test environment.9 6 Reagents.9 6.1 Sodium thiosulfate solution .9 6.2 Disinfection reagents 9 6.3 Waters to be used for testing .9 6.4 Cleaning liquids for

14、apparatus.9 7 Apparatus .10 7.1 Apparatus for migration assessment 10 7.2 Apparatus for odour and flavour assessment10 7.3 Apparatus for colour and turbidity assessment.10 8 Samples and test pieces .10 8.1 Homogeneous and non-homogeneous factory made and site applied products 10 8.2 Samples and test

15、 pieces of site applied products .11 8.3 Surface-area-to-volume ratio (S/V).11 9 Preparation of reagents and apparatus.12 9.1 Reference water .12 9.2 Water with chlorine content12 9.3 Disinfection treatment water 12 9.4 Cleaning of the glassware 12 10 23 C test procedure13 10.1 General13 10.2 Flushi

16、ng 13 10.3 Stagnation 13 10.4 Pre-washing14 10.5 Migration.14 11 Elevated temperature test procedure 14 11.1 General14 11.2 Flushing 14 11.3 Stagnation 14 11.4 Flushing 15 11.5 Elevated temperature stagnation.15 11.6 Elevated temperature rinsing .15 11.7 Elevated temperature migration.15 12 Determin

17、ation of TON and TFN 15 13 Determination of colour and turbidity .15 14 Expression of results 15 15 Test report 16 EN 14395-1:2004 (E) 3 15.1 .16 15.2 General information.16 15.3 Information on the product.16 15.4 Information on the test procedure .16 15.5 Test results.17 Annex A (informative) Schem

18、atic presentation of the test method 18 Bibliography21 EN 14395-1:2004 (E) 4 Foreword This document (EN 14395-1:2004) 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

19、, either by publication of an identical text or by endorsement, at the latest by April 2005, and conflicting national standards shall be withdrawn at the latest by April 2005. The material-dependent parameters and/or performance requirements are incorporated into the Product Standards, for example t

20、he System Standards for storage systems. According to the CEN/CENELEC Internal Regulations, 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, Hun

21、gary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14395-1:2004 (E) 5 Introduction In respect of potential adverse effects on the quality of water intended for human consump

22、tion caused by the materials, it is recalled to mind that, while awaiting the adoption of verifiable European acceptance criteria, such as proposed in a future European Acceptance Scheme, national regulations remain in force. EN 14395-1:2004 (E) 6 1 Scope This document specifies a test method for de

23、termining the organoleptic properties (odour, flavour, colour and turbidity) of test waters after their contact with products made from organic materials used in storage systems (tanks, reservoirs, ancillaries and their coatings both for factory and site applied products). Products containing cement

24、itious materials are not covered by this document. The test method described in this standard is applicable to products to be used under various conditions for the storage of water intended for human consumption and raw water used for the manufacture of water intended for human consumption. Coatings

25、 or protective layers on products which are not intended to be in contact with these types of waters are not covered by this method. This document specifies the test method comprising a set of procedures with and without a disinfection pretreatment and possible temperatures for the test waters. The

26、use of the disinfection pretreatment and the choice of the test temperature are dependant on the relevant national regulations and/or the system or product standards. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated reference

27、s, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1622:1997, Water analysis - Determination of the threshold odour number (TON) and threshold flavour number (TFN). EN ISO 7393-2:2000, Water quality - Determ

28、ination of free chlorine and total chlorine - Part 2: Colorimetric method using N, N-diethyl-1, 4-phenylenediamine for routine control purposes (ISO 7393-2:1985). EN ISO 7887:1994, Water quality - Examination and determination of colour (ISO 7887:1994). EN ISO 7027:1999, Water quality - Determinatio

29、n of turbidity (ISO 7027:1999). 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 odour organoleptic attribute perceptible by olfactory organ on sniffing certain volatile substances ISO 5492:1992 3.2 flavour complex combination of the olfactory

30、, gustatory and trigeminal sensations perceived during tasting. The flavour may be influenced by tactile, thermal, painful and/or kinaesthesic effects ISO 5492:1992 NOTE The term taste should not be used to designate the combination of gustatory, olfactory and trigeminal sensations which are designa

31、ted by the term flavour. If, in informal language, this term is used in this sense, it should always be associated with a qualifying term, e.g. musty taste, raspberry taste, corky taste. EN 14395-1:2004 (E) 7 3.3 threshold odour number (TON) dilution ratio of the migration water with the reference w

32、ater at the same temperature, beyond which this diluted sample does not have any perceptible odour 3.4 threshold flavour number (TFN) dilution ratio of the migration water with the reference water at the same temperature, beyond which this sample does not have any perceptible flavour 3.5 colour opti

33、cal property that causes the changing of the spectral composition of transmitted visible light measured at three wavelengths EN ISO 7887:1994, Clause 3 3.6 turbidity reduction of transparency of a liquid caused by the presence of undissolved matter EN ISO 7027:1999 3.7 reference water water describe

34、d as without any odour, flavour, colour and turbidity 3.8 test water water used for testing purposes prepared as described in 6.3.2 and 6.3.3 3.9 migration water test water which has been in contact with a test piece under specified conditions 3.10 blank water test water which has been kept at the s

35、ame specified conditions as migration water but without contact with the test piece 3.11 flushing water tapwater distributed by a public supplier 3.12 disinfection treatment water water containing chlorine prepared as described in 6.2.2 3.13 testing panel group of people that carried out the odour /

36、flavour assessment 3.14 storage vessels tanks, reservoirs, cisterns and their coatings 3.15 ancillary complete functional unit made up of one or more components (e.g. piping systems, ladders, structural supports, valves, baffles) EN 14395-1:2004 (E) 8 3.16 storage systems combination of storage vess

37、els and necessary ancillaries 3.17 products manufactured item in its finished form 3.18 sample one or more units, or a specified quantity, drawn from a batch or lot, selected at random for inspection, e.g. in a laboratory 3.19 test piece sample or portion which is conditioned, treated or otherwise p

38、repared to be tested to obtain a single test result 3.20 homogeneous product product where the water contact surface is made from the same material as the remainder of the product 3.21 non-homogeneous product product where the water contact surface is made from a material that differs from those com

39、prising the remainder of the product 3.22 factory made product products made in a factory under controlled conditions as part of the manufacturing process 3.23 site applied product product manufactured on site (e.g. sealing membranes), or products mixed, applied and cured on site (e.g. coatings, sea

40、lants and adhesives) 4 Principle Following a defined pretreatment procedure including flushing, stagnation with or without disinfection and pre- washing, the surface of the test pieces to be tested, exposed in practice to drinking water, is brought into contact with test waters. The migration proced

41、ure is carried out three times on the same test piece under specified conditions as follows. Test pieces are put in contact with chlorinated and unchlorinated water for 72 h at 23 C, or put in contact with unchlorinated water for 24 h at a specified temperature in the range 60 C to 85 C. After this

42、contact the migration water is assessed for colour and turbidity and by a test panel to determine the odour (TON) and flavour (TFN). Additional information is given in the relevant product standard, system standard or in national regulation concerning: the temperature to be used in the test; the nee

43、d for a disinfection pretreatment; the need to carry out a 23 C test, using chlorinated water, for products being tested at elevated temperatures. EN 14395-1:2004 (E) 9 5 Test environment When testing of odour and flavour, the test environment shall conform to the requirements given in EN 1622. 6 Re

44、agents 6.1 Sodium thiosulfate solution Sodium thiosulfate solution, comprising a solution of 3,5 g/l of sodium thiosulfate pentahydrate (Na 2 S 2 O 3 5H 2 O) analytical grade, stored in the absence of light at a temperature below 10 C, for a maximum of 4 months. 6.2 Disinfection reagents 6.2.1 Sodiu

45、m hypochlorite solution Sodium hypochlorite solution, prepared from a commercial solution of sodium hypochlorite (NaOCl) and having a known concentration of about 0,1 % by mass of free chlorine determined in accordance with EN ISO 7393-2. NOTE Unless tests have proved otherwise the sodium hypochlori

46、te solution should be considered as unstable and prepared the day of use. 6.2.2 Disinfection treatment water, shall consist of a batch of reference water (see 6.3.1) with a free chlorine content of (50 5) mg/l as Cl2 after addition of sodium hypochlorite solution (see 6.2.1). 6.3 Waters to be used f

47、or testing 6.3.1 Reference water shall be without any perceptible odour or flavour as determined according to EN 1622, and without colour and turbidity. When a reference water is chlorinated to 1,0 mg/l free chlorine and then dechlorinated after 72 h with sodium thiosulfate, it shall have no percept

48、ible odour, flavour, colour and turbidity. 6.3.2 Test water without chlorine content, shall consist of a batch of reference water (see 6.3.1) used for contact with test pieces and preparation of the blank water. 6.3.3 Test water with chlorine content, shall consist of reference water (see 6.3.1) with a free chlorine content of (1 0,2) mg/l as Cl2 after addition of sodium hypochlorite solution (see 6.2.1). 6.4 Cleaning liquids for apparatus non-perfumed biodegradable detergent; hydrochloric acid, 2