EN 1186-12:2002

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Materiali in predmeti v stiku z živili - Polimerni materiali - 12. del: Preskusne metode za celotno migracijo pri nizkih temperaturahWerkstoffe und Gegenstände in Kontakt mit Lebensmitteln - Kunststoffe - Teil 12: Prüfverfahren für die Gesamtmigration bei tiefen TemperaturenMatériaux et objets en contact avec les denrées alimentaires - Matiere plastique - Partie 12: Méthodes d'essai pour la migration globale a basses températuresMaterials and articles in contact with foodstuffs - Plastics - Part 12: Test methods for overall migration at low temperatures67.250Materiali in predmeti v stiku z živiliMaterials and articles in contact with foodstuffsICS:Ta slovenski standard je istoveten z:EN 1186-12:2002SIST EN 1186-12:2002en01-september-2002SIST EN 1186-12:2002SLOVENSKI
STANDARDSIST ENV 1186-12:19971DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1186-12April 2002ICS 67.250Supersedes ENV 1186-12:1995English versionMaterials and articles in contact with foodstuffs - Plastics - Part12: Test methods for overall migration at low temperaturesMatériaux et objets en contact avec les denréesalimentaires - Matière plastique - Partie 12: Méthodesd'essai pour la migration globale à basses températuresWerkstoffe und Gegenstände in Kontakt mit Lebensmitteln- Kunststoffe - Teil 12: Prüfverfahren für dieGesamtmigration bei tiefen TemperaturenThis European Standard was approved by CEN on 4 January 2002.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 nationalstandards may be obtained on application to the Management Centre 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 notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1186-12:2002 ESIST EN 1186-12:2002

Relationship of this European Standard with Council Directive 89/109/EECand Commission Directive 90/128/EEC and associated Directives.17Bibliography.19SIST EN 1186-12:2002

Further Directives andamendments to existing Directives are expected which could change the legislative requirements which thisstandard supports.
It is therefore strongly recommended that users of this standard refer to the latest relevantpublished Directive(s) before commencement of any of the test or tests described in this standard.EN 1186-12 should be read in conjunction with EN 1186-1, EN 1186-2, EN 1186-4, EN 1186-6 and EN 1186-8.Further Parts of this standard have been prepared concerned with the determination of overall migration fromplastics materials into food simulants.Their titles are as follows:EN 1186 Materials and articles in contact with foodstuffs – Plastics -Part 1Guide to the selection of conditions and test methods for overall migrationPart 2Test methods for overall migration into olive oil by total immersionPart 3Test methods for overall migration into aqueous food simulants by total
immersionPart 4Test methods for overall migration into olive oil by cellPart 5Test methods for overall migration into aqueous food simulants by cellPart 6Test methods for overall migration into olive oil using a pouchPart 7Test methods for overall migration into aqueous food simulants using a pouchPart 8Test methods for overall migration into olive oil by article fillingPart 9Test methods for overall migration into aqueous food simulants by article fillingPart 10Test methods for overall migration into olive oil (modified method for use in cases whereincomplete
extraction of dewaxed sunflower oil occurs)SIST EN 1186-12:2002

14C-labelled synthetic triglyceridePart 13Test methods for overall migration at high temperaturesPart 14Test methods for 'substitute tests' for overall migration from plastics intended to come intocontact with fatty foodstuffs using test media iso-octane and 95 % ethanolPart 15Alternative test methods to migration into fatty food simulants by rapid extraction into iso-octane and/or 95 % ethanolAccording to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.SIST EN 1186-12:2002

Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to and revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision.
For undated references the latest edition of thepublication referred to applies (including amendments).EN 1186-1:2002, Materials and articles in contact with food – Plastics – Part 1: Guide to the selection of conditionsand test methods for overall migration.EN 1186-2:2002, Materials and articles in contact with food – Plastics – Part 2: Test methods for overall migrationinto olive oil by total immersion.EN 1186-4:2002, Materials and articles in contact with food – Plastics – Part 4: Test methods for overall migrationinto olive oil by cell.EN 1186-6:2002, Materials and articles in contact with food – Plastics – Part 6: Test methods for overall migrationinto olive oil using a pouch.EN 1186-8:2002, Materials and articles in contact with food – Plastics – Part 8: Test methods for overall migrationinto olive oil by article filling.3 Overall migration into dewaxed sunflower oil by total immersion3.1 PrincipleThe overall migration from a sample of the plastics is determined as the loss in mass per unit of surface areaintended to come into contact with foodstuffs.The selection of the conditions of test will be determined by the conditions of use, see clauses 4, 5 and 6 of EN1186-1:2002.Test specimens of known mass are immersed in dewaxed sunflower oil for the exposure time, at temperatures from5 °C up to and including 20 °C, then taken from the dewaxed sunflower oil, blotted to remove oil adhering to thesurface, and reweighed.SIST EN 1186-12:2002

Methylation is carried out by reacting a borontrifluoride/methanol complex with fatty acids formed by hydrolysing the oil with potassium hydroxide.
An internalstandard, triheptadecanoin, is added prior to the extraction of the absorbed dewaxed sunflower oil from the testspecimens.
This ensures that any active or extractable components of the plastics react with the internal standard,as well as with the extracted dewaxed sunflower oil. The internal standard is also subjected to the hydrolysis andmethylation reactions, providing compensation for any inefficiencies in the hydrolysis and methylation processes.Migration into the dewaxed sunflower oil is calculated by subtracting the mass of dewaxed sunflower oil retained bythe test specimen from the mass of the test specimen after removal from the dewaxed sunflower oil, thensubtracting this mass from the initial mass of the specimen.The total loss in mass is expressed in milligrams per square decimetre of surface area of the specimen and theoverall migration is reported as the mean of a minimum of three determinations on separate test specimens.To allow for inaccuracies which may arise during the procedure and which may be difficult to detect, due forexample to contamination or loss of oil during the sample handling stages, four determinations are carried out onthe sample allowing for the result from one specimen to be discarded.This method includes variations that are applicable to certain plastics.NOTEBefore starting a migration exercise, the test sample should be examined for the presence of components interferingin the determination of the amount of dewaxed sunflower oil extracted, see 7.1 of EN 1186-2:2002.
If an unacceptable amountof interference is present then suitability of one of the 'other fatty food simulants' should be examined, see annex A of EN 1186-2:2002 and 9.3 and 9.5 of EN 1186-1:2002.
If an interference is present which would interfere with the triheptadecanoin internalstandard an alternative internal standard should be used, see annex A of EN 1186-2:2002, and 9.3 of EN 1186-1:2002.3.2 ReagentsThe reagents shall be as described in clause 4 of EN 1186-2:2002, except that olive oil, reference simulant D, asspecified in 4.1 of EN 1186-1:2002 is replaced by dewaxed sunflower oil, simulant D.3.3 ApparatusThe apparatus shall be as described in clause 5 of EN 1186-2:2002.3.4 Preparation of test specimensThe test specimens shall be prepared as described in clause 6 of EN 1186-2:2002.3.5 Procedure3.5.1 GeneralDetermine the applicability of the method by carrying out the procedure described in annex A of EN 1186-2:2002.If prior tests have established that the method is applicable then annex A of EN 1186-2:2002 may be omitted.Before weighing, discharge any build up of static electricity with an antistatic gun or other suitable means.3.5.2 Initial weighing of test specimensPerform the initial weighing in accordance with 7.2 of EN 1186-2:2002.SIST EN 1186-12:2002

Measure100 ml ± 5 ml of dewaxed sunflower oil (4.1 of EN 1186-2:2002, see 3.2) into each tube by measuring cylinder andstopper the tube.NOTE.1If the procedure described in annex D of EN 1186-2:2002 is used, it can be necessary to dry all of the dewaxedsunflower oil used for the migration test, see D.3.2.of EN 1186-2:2002.Alternatively mark the tubes for a volume of 100 ml and fill with dewaxed sunflower oil to the mark.
Place into oneof the tubes a thermometer or thermocouple and stopper the tubes.
Two extra tubes with a minimum of 50 ml ofdewaxed sunflower oil are required as blank simulant, if the procedure described in annex D of EN 1186-2:2002 isused.
Place the six or eight tubes, and two empty tubes, in the thermostatically controlled oven or incubator (5.12of EN 1186-2:2002) set at the test temperature.
Leave until the dewaxed sunflower oil has attained the testtemperature, using the thermometer or thermocouple to monitor the temperature.
Take all tubes from the oven andplace into four of the tubes containing dewaxed sunflower oil, weighed test specimens prepared as in clause 6 andconditioned if necessary. Stopper the tubes.
Ensure that the test specimens are totally immersed in dewaxedsunflower oil; if they are not, then add either glass beads or glass rods (5.22 of EN 1186-2
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