2.2. Metal concentrations in toy and jewelry samples
Plastic and paper/wood toys were cut into small pieces
(0.5 cm 0.5 cm) by acid-cleaned knife, and brittle/pliable toys and
paint coating samples were ground into powder. For all items,
aliquot of ~0.5 g of sample was used for concentration measurement.
Hard plastic toys, paper/wood toys and MTJ samples were
disassembled into small parts, and those parts subject to child