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The rate of reaction, Arrhenius preexponential factors, and activation energies of cyclopropane and difluoromethoxydifluoromethane, reacting with hydroxyl radical were measured by a relative method. Ethane was used as a reference and eight measurements were obtained in the range from 25 to 186 degree C that yielded an Arrhenius fit for the reaction of cyclopropane with hydroxyl radical.

Chemists are constantly striving for techniques that add dimensions of orthogonality with increased throughput and sample complexity. Ion mobility spectrometry (IM) is a gas-phase separation method that adds new dimensions to mass spectrometry (MS). IM separates gas-phase ions based on their collision cross-section and can be coupled with time-of-flight (TOF) mass spectrometry to yield a powerful tool used in the identification and characterization of proteins and peptides. A fundamental introduction to IM is presented with a focus on resolution, sensitivity, and orthogonality coupled with TOF-MS.