Performance of graphene sheets as stationary phase for capillary gas chromatographic separations

Novel stationary phases based on asphaltenes for gas chromatography

“…Capillary columns could readily be prepared in subsequent stages of studies, since asphaltenes are soluble in volatile solvents such as dichloromethane and the stationary phase could be coated onto the capillary wall by static deposition. This technique was successfully used in the investigation of novel stationary phases for GC, such as graphene . Secondly, the asphaltene stationary phases have a great potential for trapping contaminants in the gaseous phase on a large scale.…”

MEMS-based column coated with reduced graphene oxide as stationary phase for gas chromatography

“…McReynolds constants for graphene and GO were determined on capillary columns by Qi's group. 20 They pointed out that graphene exhibited weakly polar nature with McReynolds constants less than 100. That's why our RGO coated column exhibits better separation performance for nonpolar and weak polar compounds such as alkanes and esters than polar alcohols according to like-dissolves-like rule.…”

“…On the other hand, considering its high surface area, graphene-like materials have drawn tremendous attention as stationary phase for a variety of chromatographic set-ups. [17][18][19][20][21][22][23] Among them, graphene oxide and graphene have been intensely studied. Zhang 17 introduced GO sheets onto amino silica microspheres via covalent coupling into a high performance liquid chromatography (HPLC) using some coupling agents, and subsequently graphene (G) functionalized HPLC stationary phase was prepared through hydrazine reduction of GO bonded silica composite.…”

“…Feng 19 argued the GO nanosheets as gas chromatographic (GC) stationary phase for achieving good separation for H-bonding analytes with good peak shapes. Fan 20 investigated the applicability of graphene as high temperature GC stationary phase to separate a mixture containing aromatics and n-alkanes, in which graphene capillary column was heated to 280 C thanks to its high thermal stability. However, graphene as well as its analogs as stationary phase in LC and CEC exhibited severe peak tailings and poor resolution for some aromatics such as naphthalenes, biphenyls, alkylbenzenes, phthalate acid esters and nitroanilines.…”

Graphitic carbon nitride as high-resolution stationary phase for gas chromatographic separations

“…Carbon-based materials such as carbon nanotubes and fullerene [11,12] and graphene [13,14] were reported for GC separations of various types of organic analytes. g-C 3 N 4 is similar to graphene in the perspective of having a planar electron-rich carbon-based structure.…”