Illustration of DESI Technique (IMAGE) Purdue University Caption This illustration depicts the use of a technique developed at Purdue to identify bacteria in its ambient environment using mass spectrometry. The technique, called desorption electrospray ionization, or DESI, could be used to create a new class of fast, accurate detectors for applications ranging from food safety to homeland security. Credit Purdue University, Department of Chemistry Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.