Superselective aqueous inorganic phases in vapor-phase gas chromatography |
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Authors: | V G Berezkin |
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Institution: | (1) A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky prosp., 117912 Moscow, Russian Federation |
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Abstract: | Chromatographic characteristcs of aqueous solutions of inorganic electrolytes, a new class of stationary liquid phases (SLP)
for vapor-phase chromatography, are considered. The SLP are characterized by an unusually high selectivity to organic compounds
of the R-X type (R is a hydrocarbon radical, X is a polar group,e.g., hydroxyl, carboxyl, and amine; for instance, light C1-C6 alcohols are eluted from the column with a water-containing phase in the following order: hexanol<pentanol<butanol<propanol<ethanol<methanol).
The nature of the electrolyte used and its concentration in the water-containing SLP have a crucial influence on the column
selectivity and the degree of separation of the compounds subjected to chromatography. This feature provides the possibility
of controlling the column selectivity by changing the content of water vapor in the mobile phase.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 1831–1840, October, 1999. |
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Keywords: | gas chromatography superselective stationary liquid phases vapor-phase chromatography water-containing stationary liquid phases properties of water-inorganic electrolyte systems determination of impurities complex-forming stationary liquid phases preparative chromatography |
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