By T. R. Crompton

ISBN-10: 0080224652

ISBN-13: 9780080224657

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Additional resources for Additive Migration from Plastics Into Food

Sample text

Five, the ratio of the amount of extractives removed by heptane under exaggerated time-temperature test conditions compared to the amount extracted by a fat or oil under exaggerated conditions of thermal sterilisation and use. ef Chloroform-soluble extractives residue. ee,=:Corrected chloroform-soluble extractives residue. e ! or eef is substituted for e in the above formulae when necessary If when calculated by the equations in (a) and (b) of this subdivision, the extractives in milligrams per square inch exceed the limitations prescribed in paragraph (c) of this section, proceed to subdivision (ii) of this subparagraph (method for determining the amount of chloroformsoluble extractives residue).

Ten of these will be used for plastic extraction tests and the other ten will serve as blank solutions: i) Distilled water ii) 50% aqueous ethanol iii) 5% sodium carbonate iv) 5% citric acid v) Olive oil containing 2% oleic acid or liquid paraffin. Plastics samples must be handled at all times using clean thin rubber gloves (to avoid grease contamination of the test specimens). cm. (both sides of specimen included in calculation of surface area, unless the sample is a laminate in which only one side is made of plastic).

Category D Plastics for food manufacturing or processing plant should be subjected to extraction test to be agreed between the supplier and the purchaser under conditions of temperature and time appropriate to the individual use of the material. The principles of testing outlined above are in general designed to give a measure of acceleration and/or exceptional severity. There are, however, plastics which are well established in certain applications involving contact with food which under test conditions undergo attack which would not be met in service.

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Additive Migration from Plastics Into Food by T. R. Crompton


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