To do so, they used X-ray fluorescence technology to examine 200 plastic toys, such as cars, trains, figures and puzzles, which were found in nurseries, thrift shops and homes across England. They were inspecting the items for nine hazardous elements, including antimony, barium, bromine, cadmium, chromium, lead and selenium.
After analyzing the results, they found that 20 toys had traces of all nine elements, which can be chronically toxic if children are exposed to them at low levels. If the kids put the products in their mouths, they can be introduced to the toxins faster.
"Consumers should be made more aware of the potential risks associated with small, mouthable and brightly coloured old plastic toys or components,” coauthor Andrew Turner told BBC. "Without that, the attractive cost, convenience and recyclability of previously used toys has the potential to create a legacy of chemical contamination for younger children."
Furthermore, a few of the toys didn’t comply with standards set by the European Council's Toy Safety Directive. In fact, red, yellow or black plastics were the worst, because they had too much too much bromine, cadmium or lead.