First, pets died in the US in 2007, then infants in China in 2008 succumbed to the scurrilous practice of artificially boosting protein readings in milk products by adding the nitrogen-rich industrial chemical melamine to milk products. There was a global outcry when the practice was exposed; 300,000 children were affected of which 6 died. Now, researchers in China have published details of a simple and effective color-change test for melamine contamination in such products. Details appear in the journal Talanta. Their colorimetric test uses gold nanoparticles to determine whether or not a product is tainted.