HIGH RESOLUTION CHEMICAL IONIZATION MASS SPECTROSCOPY.
Abstract
A high resolution chemical ionization mass spectrometry system of high sensitivity has been developed. The resolving power of the instrument M/Delta M exceeds 50,000, and the sensitivity and quantitative accuracy are comparable to electron impact mass spectroscopy. At the same time, the spectra are much simpler and easier to interpret than conventional spectra. Salient features of chemical ionization mass spectroscopy are reviewed, and a detailed description of instrument modifications necessary for these experiments is given. Data for several miscellaneous experiments illustrating the performance are given and a systematic study of the aliphatic alcohols using methane, propane, and isobutane reagent gases is reported. Ion motion under the influence of a weak electric field with the assumption of many collisions is discussed, and it is demonstrated that satisfactory kinetic data may be obtained under these experimental conditions. The possibility that equilibrium may also exist at typical temperatures and pressures is discussed, and the metastable defocus technique is used to establish both mechanisms and properties of the reaction complex in these low-energy ion-molecule reactions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1970
- Accession Number
- AD0708731
Entities
People
- Jean H. Futrell
Organizations
- University of Utah