Nerdy Science Blog

A recent publication in the latest issue of Trends in Analytical Chemistry showed that Spanish euro contained highest traces of cocaine in Europe.  This study was carried out by chemists at University of Valencia.  The same method was also used to detect the presence of cocaine on bank notes worldwide.  However cocaine is found on nearly all the notes in circulation, one of the researchers, Miguel de la Guardia, believes that this is due to cross contamination between bank notes, and the counting machines.

(news [paper])