article: Gas chromatography–mass spectrometry
links: Nitrogen Comparative Viking program Titan (moon) Saturn's Nature (journal) Venus Helium Chemical element Food Cassini-Huygens September 11, 2001 terrorist attacks Hydrogen Solvation Emission Hewlett-Packard Huygens probe Mars Fred McLafferty Persistent Organic Pollutant Federal Aviation Administration Venera Chemist United States of America Forensics