SEARCH · Engineering Papers
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Explore the source record for details and available documents.
High resolution mass spectrometry in computer- aided interpretation
High resolution mass spectrometry with real time data acquisition, display and processing using digital computer
This final report covers three years and several phases of work in which instrumentation for the Planetary Instrument Definition and Development Program (PIDDP) were successfully developed. There were two main thrusts to this research: (1) to develop and test methods for electrostatically scanning detector field-of-views, and (2) to improve the mass resolution of plasma mass spectrometers to M/delta M approximately 25, their field-of-view (FOV) to 360 degrees, and their E-range to cover approximately 1 eV to 50 keV. Prototypes of two different approaches to electrostatic scanning were built and tested. The Isochronous time-of-flight (TOF) and the linear electric field 3D TOF devices were examined.
Real time high resolution mass spectroscopy using digital computer techniques for data acquisition, processing and presentation
High resolution mass spectrograms of molecular structures
Automatic heteroatomic plotting of high resolution mass spectral data, presenting relative intensity vs elemental composition in bar form
Complex organic compounds analysis by fast- electrical-scanning high resolution mass spectrometry and gas chromatography
Computer-coupled high resolution mass spectrometry impact on molecular structure studies
Computerized method of interpreting low resolution mass spectra in organic chemical analysis, describing inference maker program applications and results
High resolution mass spectra obtained from fast magnetic scans of gas chromatographic effluents
Algorithm, decimal weights, and molecular formulas calculated by computer for high-resolution mass spectrometry application
A FORTRAN 4 program is described which reduces the data obtained from a high resolution mass spectrograph. The program (1) calculates an accurate mass for each line on the photoplate, and (2) assigns elemental compositions to each accurate mass. The program is intended for use in a time-shared computing environment and makes use of the conversational aspects of time-sharing operating systems.
High resolution mass spectrometry in studies of stereochemistry effect on fragmentation of epimeric derivatives of azabicycloalkanes
Design of tandemly operated fast electrical scan high resolution mass spectrometer-gas chromatographic column
Organic composition of Murray and Holbrook chondrites from high resolution mass spectrometric investigations
Ring contractions in molecular ions as mechanism of N-acetylmorpholine electron impact fragmentation, using high resolution mass spectrometry and isotopic labeling
Two FORTRAN computer programs for the interpretation of low resolution mass spectra were prepared and tested. One is for the calculation of the molecular isotopic distribution of any species from stored elemental distributions. The program requires only the input of the molecular formula and was designed for compatability with any computer system. The other program is for the determination of all possible combinations of atoms (and radicals) which may form an ion having a particular integer mass. It also uses a simplified input scheme and was designed for compatability with any system.