Careful detection of toxic metals such as Pb2+ is critical to ensure environmental and food safety. Yuping Wang and colleagues from Nanjing Normal University, China have developed a method to grow and assemble gold nanoparticles using gallic acid. The resulting nanoassembly can effectively detect Pb2+ - even in tea! Check out their discovery by accessing the link below.
Using gallic acid-modified gold nanoassemblies to detect the Pb2+ of tea
Caiyun Jiang, Meihua Ma and Yuping Wang
Anal. Methods, 2012, Advance Article