新型气相色谱固定相十二烷基苯磺酸铝的研究

Studies on Separation Capability of Alumina Dodecylbenesulphonate

采用汞塞动态法制备了十二烷基苯磺酸铝玻璃毛细管柱柱1(固定液质量-体积浓度为13.6%,柱尺寸为30m×0.35mmi.d)和柱2(固定液浓度为100%,柱尺寸为39m×0.30mmi.d),所用溶剂是丙酮,并且对柱性能进行了考察。实验表明这种色谱固定相有较强的极性并对饱和烃、芳香烃、饱和酸、芳香酸、极性异构体等具有良好的分离能力,尤其对强极性物质如羧酸有独特的分离能力,峰形窄而对称,即使对痕量的羧酸也可直接定量分析。

Glass capillary column 1(13.6% w/v, 30 m×0.35 mm i.d) and column 2(10.0% w/v, 39 m×0.30 mm i.d) using alumina dodecylbenesulphonate as stationary phase were prepared and the solvent used was acetone. The experiment shows that this type of column has good characteristics. It has good capability in separating alkanes, aromatic hydrocarbons, dichlorobenzene, C_3～C_8 carboxylic acid and etc. The quantitative analysis of carboxylic acids was investigated.