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[March 2003]
Migration From Glass Study
Dr Adam Kelsall and Nicola Broadhurst of Glass Technology Services in Sheffield have recently completed a major study on the migration from glass items in contact with foodstuffs, simulating wherever possible real conditions of use. Commissioned by the Food Standards Agency, the study lasted for two years and the resulting comprehensive report is set to become a valuable resource document.The approach adopted in the study was relatively simple: By first identifying what types of glassware are in use in the UK for food contact application, a wide range of samples was collected to ensure sufficient testing of all key glass compositions in conditions that would replicate the most common usages.
Testing proved that, despite developments in production practices and increases in recycling rates, elemental migration is still low from commonly used glass compositions.
Glass, as a relatively chemically inert material, is used in a wide range of ways and there are several distinct chemical compositions used in contact with foodstuffs and beverages under different conditions. For example, soda lime silicate is used in bottles, jars and tableware; borosilicate for Pyrex and ovenware and lead crystal for decanters and goblets.
Further, certain types of glassware are often treated, coated, washed, surface damaged, cooked in, microwaved in and pasteurised during a normal life cycle.
Copies of the report (No. A03029) can be obtained from:
Dr John Dixon
The Library
Food Standards Agency
Aviation House
125 Kingsway
London
WC2B 6NH
Tel: 020 7276 8060
e-mail: john.dixon@foodstandards.gsi.gov.uk
ENDS