EN 647-1993 en Paper and Board Intended to Come into Contact with Foodstuffs - Preparation of a Hot Water Extract《与食品接触的纸和纸板 热水萃取制备》.pdf

1、BRITISH STANDARD BS EN 647:1994 Paper and board intended to come intocontact with foodstuffs Preparation of a hot water extract The European Standard EN 647:1993 has the status of a British Standard UDC 676.2:663/664:620.1:543.8BSEN647:1994 This British Standard, having been prepared under the direc

2、tionof the Consumer and Contract Goods Standards PolicyCommittee, was publishedunder the authority ofthe Standards Board and comesinto effect on 15February1994 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference CCM/47 Draft for comment 92/39056 DC ISBN

3、0 580 22480 5 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de norma

4、lisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authori

5、ty of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standar

6、diseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN647:1994 BSI 11-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2

7、 Text of EN 647 3 National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back coverBSEN647:1994 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Consumer and Contract Goods St

8、andards Policy Committee and is the English language version of EN647 Paper and board intended to come into contact with foodstuffs Preparation of a hot water extract, published by the European Committee for Standardization (CEN). EN647 was produced as a result of international discussions in which

9、the UK took an active part. A British Standard does not purport to include 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 pa

10、ges This document comprises a front cover, an inside front cover, pagesi andii, theENtitle page, pages2 to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the insid

11、e front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN647 October1993 UDC 676.2:663/664:620.1:543.8 Descriptors: Paper, paperboards, food products, food-container contact, aqueous extract, preparation, leaching tests, distilled water English version Paper and board intended to come into

12、contact with foodstuffs Preparation of a hot water extract Papier et carton destins entrer en contact avec les denres alimentaires Prparation dun extrait aqueux chaud Papier und Pappe vorgesehen fr den Kontakt mit Lebensmitteln Herstellung eines Heiwasserextraktes This European Standard was approved

13、 by CEN on 1993-10-01. 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 standar

14、ds 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 responsibility of a CEN member into its own language and notified to th

15、e Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN Euro

16、pean Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1993 Copyright reserved to CEN members Ref. No. EN 647:1993 EEN647:1993 BSI 11-1999 2 Foreword This European Standard has been prepared up by the

17、Technical Committee CEN/TC 172 “Pulp, paper and board”, the secretariat of which is held by DIN. This European Standard shall be given the status of National Standard, either by publication of an identical text or by endorsement, at the latest by April1994, and conflicting National Standards shall b

18、e withdrawn at the latest by April1994. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sw

19、eden, Switzerland and the UnitedKingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definition 3 4 Principle 3 5 Reagents 3 6 Apparatus 3 7 Sampling 3 8 Procedure 3EN647:1993 BSI 11-1999 3 1 Scope This European Standard describes the preparation of a hot water extract for investig

20、ations of certain extractives in paper and board intended to come into contact with foodstuffs. 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

21、 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 incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. IS

22、O 186, Paper and board Sampling to determine average quality. ISO 287, Paper and board Determination of moisture content Oven drying method. ISO 536, Paper and board Determination of grammage. ISO 1042, Laboratory glassware One-mark volumetric flasks. ISO 1773, Laboratory glassware Boiling flasks (n

23、arrow necked). ISO 6556, Laboratory glassware Filter flasks. 3 Definition For the purposes of this standard, the following definition applies. hot water extract the water solution obtained as a result of the hot extraction NOTEIn certain instances this extract can contain small amounts of suspended

24、particles. 4 Principle The sample is torn or cut and extracted with water for2h min in a water bath of (80 2) C, shaking occasionally. After extraction the extract is filtered if necessary. The extract or the filtrate (hot water extract) is used for the investigation of the extractives. 5 Reagents 5

25、.1 Distilled water or water of equal purity. NOTEThe quality of the water should be in accordance with the requirements of the appropriate test method for the determination of the specific extractive. 6 Apparatus Ordinary laboratory apparatus and: 6.1 Balance, accurate to0,001g. 6.2 500 ml conical f

26、lask, wide neck with ground glass stopper with tap (seeISO1773). 6.3 Filtration equipment, fritted-glass filter porosity4 (nom. size90) with filter flask of500ml (seeISO6556). 6.4 Graduated measuring cylinder, 250ml. 6.5 One-mark volumetric flask, 250ml (seeISO1042). 6.6 Protective gloves 6.7 Thermo

27、static water bath, suitable to control temperature in the range of (80 2) C. 6.8 Ceramic scissors (needed only for the determination of metals). 7 Sampling 7.1 Sampling is carried out in accordance with ISO186. Do not touch the test area of sample or testspecimen with the fingers; use protective glo

28、ves(6.6). 7.2 A minimum of10g of sample is required. 7.3 If required, take a separate sample for the determination of the grammage in accordance with ISO 536 and/or for the determination of moisture content (seeISO287). 8 Procedure 8.1 Tear or cut the sample as taken into pieces approx. 1cm 2to 2cm

29、2 . Use protective gloves (6.6). 8.2 Weigh (10 0,1)g of the test pieces to an accuracy of0,01g, put them into the conical flask(6.2), add200ml (6.4) of boiling water (5.1), and stopper the flask. Leave this preparation to stand for2h min in a water bath of (80 2) C, shaking occasionally. Decant the

30、solution and wash test pieces in the flask twice with water of80 C. If necessary filter the hot preparation (6.3). Transfer the extract and washings or the filtrate to a marked volumetric flask (6.5), cool to (23 2) C and fill up to the mark with water. Use the content of the flask for further inves

31、tigation. NOTEIf necessary, scaling up can be done but not more than twice. 8.3 Before subsampling the extract is reheated. NOTEIf precipitation occurs the extract is stirred before subsampling. 0 + 5 0 + 54 blankBSEN647:1994 BSI 11-1999 National annex NA (informative) Committees responsible The Uni

32、ted Kingdom participation in the preparation of this European Standard was entrusted by the Consumer and Contract Goods Standards Policy Committee (CCM/-) to Technical Committee CCM/47 upon which the following bodies were represented: Association of Metropolitan Authorities Association of Public Ana

33、lysts British Paper and Board Industry Federation British Plastics Federation Ministry of Agriculture, Fisheries and Food Pira International Co-opted member National annex NB (informative) Cross-references Publication referred to Corresponding British Standard ISO 186:1985 BS 3430:1986 Method for sa

34、mpling to determine the average quality of paper and board ISO 536:1976 BS 3432:1980 Method of determination of grammage of paper and board ISO 1042:1983 BS 1792:1982 Specification for one-mark volumetric flasks ISO 1773:1976 BS 2734:1984 Specification for boiling flasks (narrow-necked), conical, fl

35、at bottom and round bottom ISO 6556:1981 BS 1739:1982 Specification for filter flasksBS EN 647:1994 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe

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