Dependence of the relative retention of compounds on the average pressure of helium as a carrier gas in capillary GLC |
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Authors: | V. G. Berezkin A. A. Korolev I. V. Malyukova |
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Affiliation: | (1) A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 ul. Lenina, 117912 Moscow, Russian Federation |
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Abstract: | The dependence of retention factork i , relative retention time α i , and retention indexI i of organic compounds on the average pressure (p av) of the carrier gas (helium) was studied experimentally using a long narrow-bore capillary column with the SE-30 nonpolar phase at 120°C. The linear dependencesk i =f(p av), α i =φ(p av), andI i =φ(p av) obtained previously were found to be in good agreement with experimental data. Invariant relative retention valuesk 0,i , α 0,i , andI 0,i , which do not depend on the helium pressure, were determined for some organic compounds of various chemical classes. The dependence of the relative retention on the carrier gas pressure needs to be taken into account in precision measurements and in experiments with narrow-bore capillary columns. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 314–316, February, 1998. |
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Keywords: | capillary gas-liquid chromatography relative retention values retention factor relative retention time retention index |
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