离子液体/纤维素混配固定相分离性能研究  

Separation Performance of Ionic Liquid/Cellulose Mixture as Gas Chromatographic Stationary Phase

作　　者：赵晓洁 黄龙 宋旭燕 邢钧[1] ZHAO Xiao-Jie;HUANG Long;SONG Xu-Yan;XING Jun(Key Laboratory of Analytical Chemistry for Biology and Medicine（Ministry of Education）,College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,China;Technology Center of Hubei Branch of China Tobacco Industry Corporation,Wuhan 430051,China)

机构地区：[1]生物医学分析化学教育部重点实验室武汉大学化学与分子科学学院,武汉430072 [2]湖北中烟技术中心,武汉430051

出　　处：《分析化学》2018年第8期1289-1296,共8页Chinese Journal of Analytical Chemistry

摘　　要：将丁基修饰的纤维素衍生物C-C4与离子液体键合聚硅氧烷PIL-C12-NTf2混配制成毛细管气相色谱柱C-C4@PIL-C12,用溶剂化参数模型对比研究了此固定相与商品化极性固定相Elite-waxetr和TG-17ms的作用力特征,并考察了此固定相的分离选择性等性能。结果表明,此类纤维素混配柱具有较高的柱效(萘,2778 plates/m,k=6.20,100℃)和较好的耐用性。其特征作用力为氢键碱性、偶极/极化作用以及氢键酸性作用,且强度适中;对芳香异构体、取代烷烃、脂肪酸酯、正构烷烃以及邻苯二甲酸酯的分离选择性优于商品化极性柱Elite-waxetr和TG-17ms。A cellulose derivative（ C-C4） synthesized by ＂click ＂ reaction and methylation reaction in sequence was mixed with ionic liquid bonded polysilxoane（ PIL-C12-NTf2） to prepare a capillary column（ C-C4@ PIL-C12） for gas chromatography. The prepared column has a column efficiency of 2778 plates/m（ for naphthalene k = 6.20,100℃） and exhibits satisfying durability. Abraham’s solvation parameter model was used to reveal the interaction characteristics and some representative compounds were employed to investigate the separation selectivity. It was resulted that compared with the two commercially available polar stationary phases of Elite-waxetr and TG-17 ms,C-C4 @ PIL-C12 possessed moderate strength of the hydrogen bond basicity,dipolarity/polarizability and hydrogen bond acidity,and displayed better separation selectivity for the tested analytes,such as aromatic isomers,substituted alkanes,aliphatic acid esters,n-alkanes and phthalic acid esters.

关 键 词：纤维素衍生物 离子液体 固定相 气相色谱 

分 类 号：O652.6[理学—分析化学]