Abstract
The mass spectrometer is uniquely applicable to the solution of a wide range of problems in chemical research and production Plant stream analyzers now available enhance its advantages for rapid accurate quantittive analyses of mixtures of a large number of components Unique information concerning identity or molecular structure is obtainable from a mass spectrum, complementing well present instrumental methods such as infrared spectrophotometry Illustrations are given to show the broad potentialities of the technique. A method of classification and mechanisms of formation are discussed for the anomalous molecular rearrangements found in many spectra.