Carbon nanoparticles from corn stalk soot and its novel application as stationary phase of hydrophilic interaction chromatography and per aqueous liquid chromatography

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• 作者：Yuanyuan Li^a ; ^b ; Luan Xu^a ; Tong Chen^a ; Xiaoyan Liu^a ; Zhigang Xu^a ; Haixia Zhang^a ; ^{zhanghx@lzu.edu.cn}
• 关键词：Carbon nanoparticles ; Carbon structure ; Stationary phase ; Hydrophilic interaction liquid chromatography ; Per aqueous liquid chromatography
• 刊名：Analytica Chimica Acta
• 出版年：2012
• 出版时间：13 May, 2012
• 年：2012
• 卷：726
• 期：Complete
• 页码：102-108
• 全文大小：769 K

文摘

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. ¹³C NMR measurement shows the CNPs are mainly of sp² and sp³ 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.