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Chemistry

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  • Published Date
Displaying 1751 - 1775 of 1924

Problems and progress in the measurement of reference mass spectra

May 29, 1994
Author(s)
C L. Clifton, Anzor I. Mikaia, Stephen Stein
Compounds of interest and their availability as well as purity of the samples in the market are discussed. Difficulties in acquiring samples of common chemicals are noted. Sample preparation procedures for GC-MS analysis along with the instrumental

Classification and treatment of errors in reference mass spectra

February 27, 1994
Author(s)
Anzor I. Mikaia, S G. Lias, Stephen E. Stein
Requirements to reference spectra and criteria for mass spectrum inclusion, modification and deletion are developed as a result of evaluation of thousands of spectra and analysis of encountered errors. Errors due to a sample, device and operator, data

The control of quality in a comprehensive mass spectral library

May 30, 1993
Author(s)
Anzor I. Mikaia, S G. Lias, Stephen E. Stein
Computer generated "Quality Index" for the selection of spectra for the inclusion to the NIST/EPA/NIH mass spectral library is abandoned. We have undertaken a program to manually examine all spectra in the database. Suspect spectra are first examined to

High-resolution Charged Particle and Neutron Imaging Using Charge Injection Devices

February 1, 1993
Author(s)
Robert Gregory Downing, Cynthia J. Zeissler, Heather H. Chen-Mayer
A charge injection device (CID) camera and image processing system have been used as a position sensitive detector for energetic charged particles and low energy neutrons. This video radiation detector (VRD) is simple in design but highly effective for
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