- Practical Guide -
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ANNEX I TO SECTION 4 OF CHAPTER I
GUIDELINES FOR MIGRATION TESTING OF POLYMERIC
COATINGS ON METALS
This document will be published as a CEN-EN (see Chapter III).
Extract from a CEN ENV draft document
"Materials and articles in contact with foodstuffs -- Polymeric coatings on metal
substrates -- Guide to the selection of conditions and test methods for overall
This document has been prepared by CEN /TC 194, "Utensils in contact with food". This
document is currently submitted to the CEN Enquiry. This document has been prepared
under a mandate given to CEN by the European Commission and the European Free Trade
Association, and supports essential requirements of EU Directive(s).
No single test method has been devised which can be used to determine overall migration, at
all temperatures, in all food simulants. Indeed, owing to the practical difficulties inherent in
testing with involatile extractants such as fats and the multitude of applications in which
polymeric coatings on metal substrates come into contact with food, there are many methods
and permitted variations to methods in this prestandard.
This European Prestandard is intended to give advice on the selection of the most appropriate
type of test, test conditions and test method for a given application of a polymeric coating on
a metal substrate and is intended to be read in its entirety before testing protocols are
finalized. A test method for overall migration into aqueous simulants by article filling from
polymeric coatings on food and beverage cans and non-stick coatings is given in clause 12.
For many polymeric coated articles methods in EN 1186-2 to EN 1186-9 are suitable,
according to the form in which the article is tested. The general criteria for the operation and
assessment of testing laboratories as well as the general criteria for laboratory accreditation
bodies are set out in EN 45001, EN 45002 and EN 45003. It is recommended that
laboratories using this standard validate their procedures by testing certified reference
samples and by taking part in a proficiency scheme. Suitable proficiency schemes are
operated in Germany and in the United Kingdom, for example the German Assessment
Scheme for Food Testing (GAFT) and the Food Analysis Performance Assessment Scheme
(FAPAS) conducted by the Central Science Laboratory of the Department for the
Environment, Food and Rural Affairs.
This European Prestandard provides a guide to the selection of the appropriate conditions and
test methods for the determination of overall migration into food simulants and test media