Performance of graphene sheets as stationary phase for capillary gas chromatographic separations.
This work presents the investigation of graphene as a new type of stationary phase for capillary GC separations. Graphene capillary column (0.25 mm, i.d.) achieved column efficiency of 3100 plates/m determined by n-dodecane at 120 °C. The obtained McReynolds constants suggested the weakly polar nature of graphene sheets as GC stationary phase. As evidenced, graphene stationary phase differs from the conventional phase (5% phenyl polysiloxane) in its resolving ability and retention behaviors, and achieved better separation for the Grob and other mixtures. The advantages of graphene stationary phase may mainly originate from its specific π-π stacking interaction as well as H-bonding interaction. Furthermore, graphene column exhibited good repeatability with relative standard deviation (RSD%) in the range of 0.01-0.07% for run-to-run and 2.5-6.7% for column-to-column, respectively.
Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials and School of Chemistry, Beijing Institute of Technology, Beijing 100081, China.
Jing
J
Fan
Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials and School of Chemistry, Beijing Institute of Technology, Beijing 100081, China. Electronic address: mlqi@bit.edu.cn.
Meiling
M
Qi
Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials and School of Chemistry, Beijing Institute of Technology, Beijing 100081, China.
Ruonong
R
Fu
Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials and School of Chemistry, Beijing Institute of Technology, Beijing 100081, China. Electronic address: lqu@bit.edu.cn.
Liangti
L
Qu
D000473:Alkanes / Q000737:chemistry; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation* / Q000379:methods*; D002849:Chromatography, Gas / Q000295:instrumentation*; D006108:Graphite / Q000737:chemistry; D012833:Siloxanes / Q000737:chemistry
D000473:Alkanes; D012833:Siloxanes; C007548:n-dodecane; D006108:Graphite
Capillary gas chromatography; Graphene sheets; Stationary phase