![]() Significantly, it was found that the greatest concentrations of these compounds occurred soon after manufacture, and that they can remain at high levels in sealed containers for several years. Many VOCs were identified and although none were considered particularly reactive or harmful to specimens, this is the first time they have been recorded in this context. In the Oddy tests, lead coupons were consistently the most affected by the container materials, and polypropylene material appeared only slightly more problematic than polyethylene. In this investigation, the air inside a number of empty polypropylene and polyethylene containers was sempled for volatile organic compounds (VOCs), and standard Oddy tests were undertaken on the container materials to ascertain any extra risk to museum specimens from the new polypropylene containers. Many UK museums store their sensitive archaeological metalwork and palaeontological material in air-tight polyethylene containers to stabilise the relative humidity surrounding the specimen, but several manufacturers have recently changed their container material to polypropylene. ![]()
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