反相气相色谱研究金属离子中介甲醛印迹聚合物的气相识别  

Investigation on Gas Phase Recognition for Metal-Ion Mediated Formaldehyde Imprinted Polymer by Inversed Phase Gas Chromatography

作　　者：李辉[1] 逯翠梅[1] 谢凤[1] 许苗苗[1] 王素素[1] 李志平[1] 

机构地区：[1]吉首大学化学化工学院,吉首416000

出　　处：《分析化学》2014年第6期885-890,共6页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No.21077042);湖南省教育厅课题(No.11A094);吉首大学研究生创新基金(No.13JDY030)资助项目~~

摘　　要：采用配位聚合法制备了Co2+中介的甲醛印迹聚合物,用红外光谱和扫描电镜研究了分子印迹聚合物的表面结构。以甲醛印迹聚合物作为气相色谱固定相,采用反相气相色谱技术研究了印迹材料对模板及其结构相似物的选择保留性能、等温吸附及吸附热力学,并探讨了分子印迹聚合物对室内空气中甲醛的脱除效果。结果表明,在相同色谱条件下,分子印迹柱对模板分子的容量因子均远高于乙醛。较低柱温和较低载气流速有利于印迹材料对气态模板分子的选择保留,当柱温为90℃,载气流速7.0 mL/min,进样体积为3.0μL时,分子印迹柱对模板的容量因子高达61.1,对模板及结构类似物的分离因子达到10.66。模板分子在印迹聚合物柱上的气相吸附等温线呈近似线性,而结构类似物乙醛的吸附等温线符合BET吸附的Ⅲ类模型。分子印迹聚合物对室内空气中的甲醛也具有一定的脱除能力。A Co^2＋ ion-mediated formaldehyde imprinted polymer（ MIP） was prepared by coordination polymerization method in present work and its surface structure characterized by using IR spectrum and scanning electron microscope（ SEM）. Inversed phase gas chromatography（ IGC） technique using this formaldehyde imprinted polymer as stationary phase was utilized to investigate on the retention selectivity, isotherm adsorption and adsorption thermodynamics for this imprint material toward the template and its structural analogue. Also,the ability of this polymer in the removal of formaldehyde from room atmosphere was explored. Results indicated that the capacity of the template on the molecularly imprinted polymers（ MIPs） column was much higher than that of aldehyde and the lower column temperature and flow rate of carrier gas was beneficial for the selective retention of imprint material toward the template molecule,possessing a higher capacity factor of 61. 1 for the template and a higher separation factor of 10. 66 for this imprint polymer toward formaldehyde and aldehyde under the optimized chromatographic conditions（ column temperature： 363 K; flow rate of carrier gase： 7. 0 mL / min; injection volume： 3. 0 μL）. An approximate linear adsorption isotherm for the template and a BET Ⅲ one for the analogue on the MIPs was observed. In addition,this molecularly imprinted polymer was shown with higher capability in the removal of formaldehyde from room atmosphere.

关 键 词：分子印迹聚合物 气相吸附 反相气相色谱 甲醛 

分 类 号：O657.71[理学—分析化学]