Etched Emitter for Mass Spectrometry (IMAGE) DOE/Pacific Northwest National Laboratory Caption A PNNL-developed method to manufacture emitters for mass spectrometry allows emitters like the one shown here to spray aerosols at extremely low, controlled rates without clogging. This allows more of a sample to be analyzed by the mass spectrometer, which helps scientists learn more about the molecules they study. Credit Pacific Northwest National Laboratory Usage Restrictions Credit required 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.