Home » BBC News - Technology » technology news » Schoolgirl invents low-cost lead detecting device Schoolgirl invents low-cost lead detecting device Unknown 4:22 PM BBC News - Technology technology news Gitanjali Rao's device uses carbon nanotubes to detect the presence of lead in water. from BBC News - Technology http://ift.tt/2ASJInu Share: Facebook Twitter Google+ StumbleUpon Digg Delicious LinkedIn Reddit Technorati