Zhao Qiming, Wu Shuchao, Zhang Kai, Lou Chaoyan, Zhang Peiming, Zhu Yan
Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China.
Zhejiang Institute of Geology and Mineral Resources, Hangzhou, 310007 Zhejiang, China.
J Chromatogr A. 2016 Oct 14;1468:73-78. doi: 10.1016/j.chroma.2016.09.009. Epub 2016 Sep 4.
This work reports the application of hydrothermal carbon nanospheres (HCNSs) as stationary phases in ion chromatography. HCNSs were facilely quaternized through polycondensation of methylamine and 1,4-butanediol diglycidyl ether. The quaternization was confirmed by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Owing to the electrostatic interaction, quaternized HCNSs were equably attached onto the surface of sulfonated polystyrene-divinylbenzene (PS-DVB) beads to construct the anion exchangers. The aggregation was verified by scanning electron microscopy and elemental analysis. Common anions, aliphatic monocarboxylic acids, polarizable anions, and aromatic acids were well separated on the stationary phases with good stability and symmetry. The prepared column was further applied to detect phosphate content in Cola drink samples. The limit of detection (S/N=3) was 0.09mg/L, and the relative standard deviation (n=10) of retention time was 0.31%. The average recovery was 99.58%.
本工作报道了水热碳纳米球（HCNSs）作为离子色谱固定相的应用。通过甲胺与1,4 - 丁二醇二缩水甘油醚的缩聚反应，HCNSs被轻松地季铵化。傅里叶变换红外光谱和X射线光电子能谱证实了季铵化反应。由于静电相互作用，季铵化的HCNSs均匀地附着在磺化聚苯乙烯 - 二乙烯基苯（PS - DVB）微球表面，构建了阴离子交换剂。扫描电子显微镜和元素分析验证了聚集情况。常见阴离子、脂肪族一元羧酸、可极化阴离子和芳香酸在该固定相上得到了良好的分离，具有良好的稳定性和对称性。制备的色谱柱进一步应用于检测可乐饮料样品中的磷酸盐含量。检测限（S/N = 3）为0.09mg/L，保留时间的相对标准偏差（n = 10）为0.31%。平均回收率为99.58%。
