Fan Jing, Qi Meiling, Fu Ruonong, Qu Liangti
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.
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.
J Chromatogr A. 2015 Jun 19;1399:74-9. doi: 10.1016/j.chroma.2015.04.030. Epub 2015 Apr 23.
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.
本研究介绍了将石墨烯作为一种新型固定相用于毛细管气相色谱分离的研究。石墨烯毛细管柱（内径0.25 mm）在120℃下由正十二烷测定的柱效为3100塔板/米。所获得的麦克雷诺兹常数表明石墨烯片作为气相色谱固定相具有弱极性性质。有证据表明，石墨烯固定相在分离能力和保留行为方面与传统固定相（5%苯基聚硅氧烷）不同，并且对格罗布混合物和其他混合物实现了更好的分离。石墨烯固定相的优势可能主要源于其特定的π-π堆积相互作用以及氢键相互作用。此外，石墨烯柱表现出良好的重复性，批间相对标准偏差（RSD%）在0.01 - 0.07%范围内，柱间相对标准偏差在2.5 - 6.7%范围内。
