By T. R. Crompton
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Additional resources for Additive Migration from Plastics Into Food
Prepare twenty tubes). 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).
Made using redistilled ethanol. /v. P. Lev. in the place of olive oil. Additive Migration from Plastics into Food 26 Procedure 5. (a) Carry out each extractability test and blank run in duplicate. Into five extraction tubes measure 200 ml. e. prepare twenty tubes). 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.
Liquid paraffin shows absorptions due to aromatic impurities below 280nm but these can be removed by percolation through silica gel. 020 in thick sheets of polypropylene. F. extractants for 10 days at 60 C. In the different extractants examined, the position of the aromatic absorption peak due to benzoic acid varied between 268 and 275 nm according to the nature of the solvent. The procedure was calibrated against synthetic solutions of benzoic acid in the various extractants and this showed that the method was capable of determining benzoic acid down to 3ppm using a 1 cm sample cell.
Additive Migration from Plastics Into Food by T. R. Crompton