Gas-liquid chromatography of esters of saturated fluorinated carboxylic acids
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GLC has been used to determine the contribution of the methylene and difluoromethylene units to the sorption energy of the members of twelve homologous and pseudohomologous series of esters of n-polyfluorinated carboxylic acids for the SE-30 and SKTFT-50Kh stationary phases at 60–160‡C. An unusual increase in the energy of sorption of the methylene and difluoromethylene units with the increasing mass of the homolog has been observed. It has been found that, in distinction from the contributions of the methylene units, the sorption energy of the difluoromethylene units in the pseudohomologs is higher on the fluorinecontaining phase SKTFT-50Kh than on the nonpolar SE-30 phase, except the first unit. It has been shown that an increase in the temperature of the analysis reduces the energy contributions but that it has no influence on the general character of change of the sorption energy of the ester homologs and pseudohomologs.
KeywordsMethylene Ester Chromatography Stationary Phasis Carboxylic Acid
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- 1.E. P. Promyshlennikova, V. E. Kirichenko, K. I. Pashkevich, et al., Izv. Akad. Nauk SSSR, Ser. Khim., No. 2, 418 (1991).Google Scholar
- 2.R. V. Golovnya and D. N. Grigor'eva, Izv. Akad. Nauk SSSR, Ser. Khim., No. 6, 240 (1983).Google Scholar
- 3.D. N. Grigor'eva, R. V. Golovnya, and A. V. Vasil'ev, Zh. Anal. Khim.,44, No. 7, 1274 (1989).Google Scholar
- 4.é. M. Marek, I. P. Kolenko, A. Ya. Zapevalov, et al., Zh. Prikl. Spektrosk.,19, No. 1, 130 (1973).Google Scholar