BS-EN-13130-6-2004.pdf

BRITISH STANDARD BS EN 13130-6:2004 Materials and articles in contact with foodstuffs Plastics substances subject to limitation Part 6: Determination of vinylidene chloride in plastics The European Standard EN 13130-6:2004 has the status of a British Standard ICS 67.250 ? BS EN 13130-6:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 21 June 2004 © BSI 21 June 2004 ISBN 0 580 43968 2 National foreword This British Standard is the official English language version of EN 13130-6:2004. It supersedes DD ENV 13130-6:1999 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee CW/47, Materials and articles in contact with foodstuffs, to Subcommittee CW/47/1, Migration from plastics, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The 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”, 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 immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee 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. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 16, an inside back cover 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. DateComments EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 13130-6 May 2004 ICS 67.250 English version Materials and articles in contact with foodstuffs - Plastics substances subject to limitation - Part 6: Determination of vinylidene chloride in plastics Matériaux et objets en contact avec les denrées alimentaires - Substances dans les matières plastiques sujettes à des restrictions - Partie 6 : Détermination du chlorure de vinylidène dans les matières plastiques Werkstoffe und Gegenstände in Kontakt mit Lebensmitteln - Substanzen in Kunststoffen, die Beschränkungen unterliegen - Teil 6: Bestimmung von Vinylidenchlorid in Kunststoffen This European Standard was approved by CEN on 24 March 2004. 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 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 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, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2004 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13130-6:2004: E EN 13130-6:2004 (E) 2 Contents page Foreword3 1 Scope 6 2 Normative references6 3 Principle6 4 Reagents.6 5 Apparatus .7 6 Samples 8 6.1 Sample storage8 6.2 Test sample preparation .8 6.2.1 General8 6.2.2 Preparation of dissolved test sample solutions and standard addition solutions.8 6.2.3 Preparation of blank samples.9 6.2.4 Preparation of 'hot jar' test samples9 7 Procedure .9 7.1 GC preparation.9 7.1.1 GC parameters.9 7.1.2 Electron capture detector optimization.10 7.1.3 Performance of GC measurements10 7.2 Calibration10 8 Expression of results 10 8.1 Method of calculation10 8.1.1 GC interferences10 8.1.2 Graphical determination using internal standard 11 8.1.3 Graphical determination via external standardization.11 8.1.4 Calculation of the concentration using a response factor11 8.2 Precision.12 8.2.1 Validation12 8.2.2 Repeatability and reproducibility.13 8.2.3 Detection limit13 9 Confirmation.13 9.1 Requirement for confirmation13 9.2 Confirmation by combined gas chromatography-mass spectrometry13 9.3 Confirmation by analysis on a GC column of different polarity .13 10 Test report14 Annex A (normative) Manual sample injection 15 Bibliography16 EN 13130-6:2004 (E) 3 Foreword This document (EN 13130-6:2004) has been prepared by Technical Committee CEN/TC 194 “Utensils in contact with food”, the secretariat of which is held by BSI. This document was prepared by Subcommittee SC1 of TC 194 as one of a series of analytical test methods for plastics materials and articles in contact with foodstuffs. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2004, and conflicting national standards shall be withdrawn at the latest by November 2004. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This standard is intended to support Directives 2002/72/EC 1, 89/109/EEC 2, 82/711/EEC 3 and its amendments 93/8/EEC 4 and 97/48/EC 5, and 85/572/EEC 6. At the time of preparation and publication of this part of EN 13130 the European Union legislation relating to plastics materials and articles intended to come into contact with foodstuffs is incomplete. Further Directives and amendments to existing Directives are expected which could change the legislative requirements which this standard supports. It is therefore strongly recommended that users of this standard refer to the latest relevant published Directive(s) before commencement of a test or tests described in this standard. EN 13130-6 should be read in conjunction with EN 13130-1. Further parts of EN 13130, under the general title Materials and articles in contact with foodstuffs - Plastics substances subject to limitation, have been prepared, and others are in preparation, concerned with the determination of specific migration from plastics materials into foodstuffs and food simulants and the determination of specific monomers and additives in plastics. The other parts of EN 13130 are as follows. Part 1: Guide to test methods for the specific migration of substances from plastics to foods and food simulants and the determination of substances in plastics and the selection of conditions of exposure to food simulants Part 2: Determination of terephthalic acid in food simulants Part 3: Determination of acrylonitrile in food and food simulants Part 4: Determination of 1,3-butadiene in plastics Part 5: Determination of vinylidene chloride in food simulants Part 7: Determination of monoethylene glycol and diethylene glycol in food simulants Part 8: Determination of isocyanates in plastics Part 9: Determination of acetic acid, vinyl ester in food simulants Part 10: Determination of acrylamide in food simulants Part 11: Determination of 11-aminoundecanoic acid in food simulants Part 12: Determination of 1,3-benzenedimethanamine in food simulants Part 13: Determination of 2,2-bis(4-hydroxyphenyl)propane (Bisphenol A) in food simulants EN 13130-6:2004 (E) 4 Part 14: Determination of 3,3-bis(3-methyl-4-hydroxyphenyl)-2-indoline in food simulants Part 15: Determination of 1,3-butadiene in food simulants Part 16: Determination of caprolactam and caprolactam salt in food simulants Part 17: Determination of carbonyl chloride in plastics Part 18: Determination of 1,2-dihydroxybenzene, 1,3- dihydroxybenzene, 1,4- dihydroxybenzene, 4,4- dihydroxybenzophenone and 4,4dihydroxybiphenyl in food simulants Part 19: Determination of dimethylaminoethanol in food simulants Part 20: Determination of epichlorohydrin in plastics Part 21: Determination of ethylenediamine and hexamethylenediamine in food simulants Part 22: Determination of ethylene oxide and propylene oxide in plastics Part 23: Determination of formaldehyde and hexamethylenetetramine in food simulants Part 24: Determination of maleic acid and maleic anhydride in food simulants Part 25: Determination of 4-methyl-pentene in food simulants Part 26: Determination of 1-octene and tetrahydrofuran in food simulants Part 27: Determination of 2,4,6-triamino-1,3,5-triazine in food simulants Part 28: Determination of 1,1,1-trimethylopropane in food simulants Parts 1 to 8 are European Standards. Parts 9 to 28 are Technical Specifications, prepared within the Standards, Measurement and Testing project, MAT1-CT92-0006, “Development of Methods of Analysis for Monomers”. 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 13130-6:2004 (E) 5 Introduction Vinylidene chloride (1,1-dichloroethylene), H2C=CCl2, is a monomer used in the manufacture of certain plastics films and coatings intended to come into contact with foodstuffs. During the manufacture of vinylidene chloride polymers and copolymers, residual vinylidene chloride monomer can remain in the polymer and can migrate into food coming into contact with the polymer. The method described in this European Standard should be used in conjunction with part 1 of this standard, which describes the procedures required prior to the determination of vinylidene chloride. EN 13130-6:2004 (E) 6 1 Scope This part of this European Standard specifies a method for the determination of vinylidene chloride (VdC) in plastics materials and articles. The method is applicable to poly(vinylidene chloride) (PVdC) films, PVdC coated films, and laminates and coextruded materials containing PVdC. The level of vinylidene chloride determined is expressed as milligrams of vinylidene chloride per kilogram of polymer. The method is appropriate for the quantitative determination of vinylidene chloride at a level of 5 mg/kg in plastics materials and articles. 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 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 (including amendments). EN 13130-1:2004, Materials and articles in contact with foodstuffs - Plastics substances subject to limitation - Part 1: Guide to test methods for the specific migration of substances from plastics to foods and food simulants and the determination of substances in plastics and the selection of conditions of exposure to food simulants. 3 Principle The level of vinylidene chloride in a polymer is determined by headspace gas chromatography with automated sample injection, using either electron capture detection (ECD) or flame ionization detection (FID). As it is not possible to obtain test material free of vinylidene chloride, the method of standard addition is employed. Quantification is achieved using 1-chloropropane (1-CP) as an internal standard. Plastics samples are dissolved in N,N-dimethylacetamide (DMA) prior to headspace analysis. For samples not soluble in this solvent, e.g. laminates and co-extrusions, determination can be carried out by the 'hot jar' method in which the polymer alone is heated to release the vinylidene chloride. If interferences are experienced with the internal standard then calibration is carried out by external standardization. If automated headspace sampling cannot be performed then manual injection as described in annex A shall be applied. Confirmation of vinylidene chloride levels is carried out either by combined gas chromatography/mass spectrometry (GC/MS) or by re-analysis on a second GC column of different polarity. 4 Reagents WARNING: All chemicals are hazardous to health to a greater or lesser extent. It is beyond the scope of this standard to give instructions for the safe handling of all chemicals, that meet, in full, the legal obligations in all countries in which this standard may be followed. Therefore, specific warnings are not given and users of this standard shall ensure that they meet all the necessary safety requirements in their own country. 4.1 Vinylidene chloride, H2C=CCl2, of purity greater than 99 % (w/w). EN 13130-6:2004 (E) 7 4.2 1-Chloropropane, CH3(CH2)2Cl, containing no impurity 1 % by area which will elute at the same GC retention time as vinylidene chloride. 4.3 N,N-Dimethylacetamide CH3CON(CH3)2 free of any interferences ( 1 % area) with the vinylidene chloride and 1-chloropropane peaks. 4.4 Standard solutions of vinylidene chloride in N,N-dimethylacetamide with defined concentrations in the range 25 mg/kg to 500 mg/kg, prepared as described in 4.4.1 and 4.4.2. 4.4.1 Prepare concentrated standard vinylidene chloride solutions at approximately 2,5 g/kg and 1,2 g/kg as follows: a) To a 50 ml flask or vial tared with cap, add approximately 50 ml (46,5 g) N,N-dimethylacetamide (4.3), close and weigh to an accuracy of 0,1 mg. Add to the N,N-dimethylacetamide a quantity of approximately 0,1 ml (0,125 g) vinylidene chloride (4.1) and shake the closed flask. Determine the exact mass of vinylidene chloride added, in grams per kilogram, by re-weighing to an accuracy of 0,1 mg. b) Repeat item a) using 0,05 ml (0,06 g) vinylidene chloride. c) Repeat items a) and b) to provide a second set of concentrated standard solutions. 4.4.2 Prepare dilute standard vinylidene chloride solutions as follows; a) To two 20 ml flasks or vials tared with cap, add 18 ml and 16 ml N,N-dimethylacetami