Spectrometry data retrieval

J. Proton Affinity Retrieval Prograno. With the current high level of interest in chemical ionization mass spectrometry, there is a need for a reliable file of gas phase proton affinities. No data base of this sort has previously been assembled and for these reasons, the task of gathering and evaluating all published gas phase proton affinities has been undertaken by Rosenstock and co-workers at NBS. This file [28], which has about 400 critically evaluated gas phase proton affinities drawn from the open literature, and can be searched on the basis of compound type or the proton affinity value. It will be appended to the MSSS and the bibliographic component will be merged with the Mass Spectrometry Bulletin Search System. 

Figure 15. Monitoring from mass spectrometry of saccharide plus fatty acid ions of tetrahexosyl-ceramide of villus and crypt epithelial cells of black and white rat. Data were retrieved from 200 fxg of the permethylated-reduced mixtures of total glycolipids, were evaporated at 5°C/min. Spectra recorded each 38 sec. Electron energy was 34 eV, acceleration voltage 4 kV, trap current 500 /jA,...

McLellan, T. Liao, Q. Trudel, S. Phillips, D. Kelly, M. Automated Data Capture and Retrieval Linking Open Access Analysis to a Scientific Desktop Application, in Proceedings ofthe 49th ASMS Conference onMass Spectrometry and Allied Topics, Chicago, Illinois, May 27-31, 2001. 

Fluorescence spectrometry not only provides quantitative or semiquantitative data on concentrations, it may also be used to obtain information on the degree of condensation of humic compounds. Although only the fluorophor and the immediately adjacent parts of the molecule are involved, some useful information may be retrieved. Synchronous fluorescence spectrometry has also been used for remote sensing purposes (Vodacek, 1989). 

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