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- W21097345 abstract "A major problem in mass spectrometric analysis of coal hydrogenation products is excessive carbiding of the tungsten filament, resulting in instrument instability. Rhenium filaments offer much better temperature and pattern stability, particularly for analysing samples containing large percentages of aromatics. The life of rhenium emitters has been comparable with that of tungsten emitters. A combination of data obtained with low ionizing voltage and with conventional type-analysis permits rapid comparisons of coal hydrogenation products. Molecular weights and structural types can be determined in the aromatic and saturated fractions. Type-analysis methods that are relatively independent of structural variations have been applied to these two fractions. Many structural types in the phenolic portion can be identified from two mass spectrometer runs, one on the original sample, the second on the trimethylsilyl ether derivative. A limited number of spectra of pure compounds, made at low ionizing voltage, permit at least a semi-quantitative determination of carbon number distribution in phenolic fractions." @default.
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- W21097345 date "1959-01-01" @default.
- W21097345 modified "2023-09-23" @default.
- W21097345 title "USE OF RHENIUM FILAMENTS AND LOW IONIZING VOLTAGES FOR ANALYSING LIQUID PRODUCTS FROM COAL HYDROGENATION BY MASS SPECTROMETRY" @default.
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- W21097345 doi "https://doi.org/10.1016/b978-0-08-009210-2.50020-1" @default.
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