title: Carbon nanoparticles from corn stalk soot and its novel application as stationary phase of hydrophilic interaction chromatography and per aqueous liquid chromatography.
abstract: Carbon nanoparticles (CNPs) (6-18 nm in size) were prepared by refluxing corn stalk soot in nitric acid. The obtained acid-oxidized CNPs are soluble in water due to the existence of carboxylic and hydroxyl groups. (13)C NMR measurement shows the CNPs are mainly of sp(2) and sp(3) carbon structure different from CNPs obtained from candle soot and natural gas soot. Furthermore, these CNPs exhibit unique photoluminescence properties. Interestingly, the CNPs might be exploited to immobilize on the surface of porous silica particles as chromatographic stationary phase. The resultant packing material was evaluated by high-performance liquid chromatography, indicating that the new stationary phase could be used in hydrophilic interaction liquid chromatography (HILIC) and per aqueous liquid chromatography (PALC) modes. The separation of five nucleosides, four sulfa compounds and safflower injection was achieved by using the new column in the HILIC and PALC modes, respectively.
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou University, China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Li
authors.forename: Luan
authors.initials: L
authors.lastname: Xu
authors.forename: Tong
authors.initials: T
authors.lastname: Chen
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Liu
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Xu
authors.forename: Haixia
authors.initials: H
authors.lastname: Zhang
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D006863:Hydrogen-Ion Concentration; D057927:Hydrophobic and Hydrophilic Interactions; D053758:Nanoparticles / Q000737:chemistry*; D009711:Nucleotides / Q000302:isolation & purification; D009994:Osmolar Concentration; D058428:Silica Gel / Q000737:chemistry; D003313:Zea mays / Q000737:chemistry*
chemical_list: D009711:Nucleotides; D058428:Silica Gel; D002244:Carbon