title: Novel stationary phases based on asphaltenes for gas chromatography.
abstract: We present the results of investigations on the possibility of the application of the asphaltene fraction isolated from the oxidized residue from vacuum distillation of crude oil as a stationary phase for gas chromatography. The results of the investigation revealed that the asphaltene stationary phases can find use for the separation of a wide range of volatile organic compounds. The experimental values of Rohrschneider/McReynolds constants characterize the asphaltenes as stationary phases of medium polarity and selectivity similar to commercially available phases based on alkyl phthalates. Isolation of asphaltenes from the material obtained under controlled process conditions allows the production of a stationary phase having reproducible sorption properties and chromatographic columns having the same selectivity. Unique selectivity and high thermal stability make asphaltenes attractive as a material for stationary phases for gas chromatography. A low production cost from a readily available raw material (oxidized petroleum bitumens) is an important economic factor in case of application of the asphaltene stationary phases for preparative and process separations.
authors.affiliation: Department of Chemical and Process Engineering, Chemical Faculty, Gdansk University of Technology, Gdansk, Poland.
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Boczkaj
authors.affiliation: Department of Chemical and Process Engineering, Chemical Faculty, Gdansk University of Technology, Gdansk, Poland.
authors.forename: Malwina
authors.initials: M
authors.lastname: Momotko
authors.affiliation: Department of Chemical and Process Engineering, Chemical Faculty, Gdansk University of Technology, Gdansk, Poland.
authors.forename: Dorota
authors.initials: D
authors.lastname: Chruszczyk
authors.affiliation: Kettering University, 1700 University Avenue, Flint, MI 48504, USA. aprzyjaz@kettering.edu.
authors.forename: Andrzej
authors.initials: A
authors.lastname: Przyjazny
authors.affiliation: Department of Chemical and Process Engineering, Chemical Faculty, Gdansk University of Technology, Gdansk, Poland.
authors.forename: Marian
authors.initials: M
authors.lastname: Kamiński
keywords: Asphaltenes; Gas chromatography; McReynolds constants; Selectivity; Stationary phases