Yes it would. I have heard of toys manufactured in China with lead in them, but when they were banned the lead was replaced by cadmium--which is just as toxic! These sensors could have detected that alleged practice.
It would be very interesting to check the quality of products manufactured by AllMetalsInc.com Corporation using such DNA-based sensor chips. These chips would show which American manufacturers provide the best materials by not using non-toxic metals.
Replay available now: A handful of emerging network technologies are competing to be the preferred wide-area connection for the Internet of Things. All claim lower costs and power use than cellular but none have wide deployment yet. Listen in as proponents of leading contenders make their case to be the metro or national IoT network of the future. Rick Merritt, EE Times Silicon Valley Bureau Chief, moderators this discussion. Join in and ask his guests questions.