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- W2375461012 abstract "The structure of normal paraffins is rather simple, but their infrared spectra are very similar and are difficult to be identified especially when the carbon number is large. According to their structural characteristics, the constancy of their absorption frequencies, and absorptivities of deformation vibration of CH_2 and CH_3, the authors proposed an analytical method, based on the linear relationship between the ratio of optical densities at 722 cm~(-1) and 1380 cm~(-1) and the ratio of radical numbers of CH_2 and CH_3. The influence of spectral slit width was studied. This simple and accurate method provides a means for the determination of the carbon numbers n of pure compound (and so its structure) and the average content of functional groups of blends without resorting to accurate measurement of concentration and tedious calculations. The results of 11 pure normal paraffins from C_6 to C_(22) and their blends show that the deviation of determined n is generally not more than half a carbon atom and that of percentage of methyl group not more than 1%.The proposed method is simpler and more accurate as compared with the average absorptivities method." @default.
- W2375461012 created "2016-06-24" @default.
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- W2375461012 date "1965-01-01" @default.
- W2375461012 modified "2023-09-25" @default.
- W2375461012 title "DETERMINATION OF HYDROCARBON FUNCTIONAL GROUPS BY INFRARED SPECTROSCOPY——I. DETERMINATION OF NORMAL PARAFFINS" @default.
- W2375461012 hasPublicationYear "1965" @default.
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