Carolina Belenguer and EnricPellicer, from the Department of Analytical Chemistry at the University of Valencia, have developed in the last year a new method for the detection of polychlorinated biphenyls (PCBs) in environmental water samples. It is an innovation of great importance because it facilitates the detection of these persistent organic pollutants (POPs), which are harmful to the environment and human health, and are the causes of the development of certain types of cancer.