Benzophenone in cartonboard packaging materials

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Benzophenone in cartonboard packaging materials and the factors that influence its migration into food W. A. C. Anderson a; L. Castle a a Department for Environment Central Science Laboratory Sand Hutton York YO41 1LZ UK. Online Publication Date: 01 June 2003

To cite this Article Anderson, W. A. C. and Castle, L.(2003)'Benzophenone in cartonboard packaging materials and the factors that

influence its migration into food',Food Additives & Contaminants: Part A,20:6,607 — 618 To link to this Article: DOI: 10.1080/0265203031000109486 URL: http://dx.doi.org/10.1080/0265203031000109486

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Food Additives and Contaminants, June 2003, Vol. 20, No. 6, 607–618

Benzophenone in cartonboard packaging materials and the factors that influence its migration into food W. A. C. Anderson and L. Castle* Central Science Laboratory, Department for Environment, Food and Rural Affairs, Sand Hutton, York YO41 1LZ, UK

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(Received 30 December 2002; accepted 10 March 2003)

Benzophenone may be present in cartonboard foodpackaging materials as a residue from UV-cured inks and lacquers used to print on the packaging. It may also be present if the cartonboard is made from recycled fibres recovered from printed materials. A method has been devised to test for benzophenone in cartonboard packaging materials and to test for migration levels in foodstuffs. Packaging is extracted with solvent containing d10-benzophenone as the internal standard. Foods are extracted with solvent containing d10-benzophenone and the extract defatted using hexane. The extracts are analysed by GC-MS. For analysis of food, the limit of detection was 0.01 mg kg
1 and the limit of quantification was 0.05 mg kg
1. The calibration was linear from 0.05 to 20 mg kg
1. The method for food analysis was validated in-house and it also returned satisfactory results in a blind check-sample exercise organized by an independent laboratory. The methods were applied to the analysis of 350 retail samples that used printed cartonboard packaging. A total of 207 (59%) packaging samples had no significant benzophenone (99% claimed for the standard benzophenone by the supplier.

Benzophenone in cartonboard packaging materials

Quality control materials A sample of card made without recycled fibres and that was unprinted and unpigmented (Norwich Colour Print Ltd, Norwich, UK). The card contained no detectable benzophenone (