Thermodynamic consideration of the retention mechanism in a poly(perfluoroalkyl ether) gas chromatographic stationary phase used in packed columns

Abstract Retention volumes of fifteen hydrocarbons were measured in columns containing several concentrations of a commercial poly(perfluoroalkyl ether), Fomblin Y HVAC 140/13, as the stationary phase. Two different types of packing were studied: one of them employed pre-silylated Chromosorb P AW DM...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Castells, Reynaldo César, Romero, Lílian Mónica, Nardillo, Ángel Miguel
Formato: Articulo
Lenguaje:Inglés
Publicado: 1995
Materias:
Ciencias Exactas
Química
Gas chromatography
Adsorption
Hydrocarbon
Poly(perflúoroalkyl ether)
Mixed retention
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/122912
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-122912
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Gas chromatography
Adsorption
Hydrocarbon
Poly(perflúoroalkyl ether)
Mixed retention
spellingShingle Ciencias Exactas
Química
Gas chromatography
Adsorption
Hydrocarbon
Poly(perflúoroalkyl ether)
Mixed retention
Castells, Reynaldo César
Romero, Lílian Mónica
Nardillo, Ángel Miguel
Thermodynamic consideration of the retention mechanism in a poly(perfluoroalkyl ether) gas chromatographic stationary phase used in packed columns
topic_facet Ciencias Exactas
Química
Gas chromatography
Adsorption
Hydrocarbon
Poly(perflúoroalkyl ether)
Mixed retention
description Abstract Retention volumes of fifteen hydrocarbons were measured in columns containing several concentrations of a commercial poly(perfluoroalkyl ether), Fomblin Y HVAC 140/13, as the stationary phase. Two different types of packing were studied: one of them employed pre-silylated Chromosorb P AW DMCS as the solid support and the other type was prepared by coating the stationary phase on Chromosorb P AW and silylating on-column. On-column silylated columns showed unequivocal symptoms of partial deactivation; retention volumes changed regularly with the content of stationary phase in pre-silylated columns. Analysis of retention in pre-silylated columns indicates that a mixed mechanism (partition and adsorption onto the gas-liquid interface) is operative. The systems hydrocarbon-perfluorocompound show pronounced positive deviations from the ideal behaviour that can be attributed to repulsion between the hydrocarbon and the perfluorocompound segments.
format Articulo
Articulo
author Castells, Reynaldo César
Romero, Lílian Mónica
Nardillo, Ángel Miguel
author_facet Castells, Reynaldo César
Romero, Lílian Mónica
Nardillo, Ángel Miguel
author_sort Castells, Reynaldo César
title Thermodynamic consideration of the retention mechanism in a poly(perfluoroalkyl ether) gas chromatographic stationary phase used in packed columns
title_short Thermodynamic consideration of the retention mechanism in a poly(perfluoroalkyl ether) gas chromatographic stationary phase used in packed columns
title_full Thermodynamic consideration of the retention mechanism in a poly(perfluoroalkyl ether) gas chromatographic stationary phase used in packed columns
title_fullStr Thermodynamic consideration of the retention mechanism in a poly(perfluoroalkyl ether) gas chromatographic stationary phase used in packed columns
title_full_unstemmed Thermodynamic consideration of the retention mechanism in a poly(perfluoroalkyl ether) gas chromatographic stationary phase used in packed columns
title_sort thermodynamic consideration of the retention mechanism in a poly(perfluoroalkyl ether) gas chromatographic stationary phase used in packed columns
publishDate 1995
url http://sedici.unlp.edu.ar/handle/10915/122912
work_keys_str_mv AT castellsreynaldocesar thermodynamicconsiderationoftheretentionmechanisminapolyperfluoroalkylethergaschromatographicstationaryphaseusedinpackedcolumns
AT romerolilianmonica thermodynamicconsiderationoftheretentionmechanisminapolyperfluoroalkylethergaschromatographicstationaryphaseusedinpackedcolumns
AT nardilloangelmiguel thermodynamicconsiderationoftheretentionmechanisminapolyperfluoroalkylethergaschromatographicstationaryphaseusedinpackedcolumns
bdutipo_str Repositorios
_version_ 1764820449450000385

Ejemplares similares