通过简单的搅拌共混方式制备了磁性氨基功能化的金属有机骨架化合物(MOFs)材料,得到的复合材料磁性和热稳定性良好,比表面积大,被用于不同极性防腐剂(苯甲酸、山梨酸、对羟基苯甲酸丙酯和对羟基苯甲酸丁酯)的萃取。优化磁固相萃取及解...通过简单的搅拌共混方式制备了磁性氨基功能化的金属有机骨架化合物(MOFs)材料,得到的复合材料磁性和热稳定性良好,比表面积大,被用于不同极性防腐剂(苯甲酸、山梨酸、对羟基苯甲酸丙酯和对羟基苯甲酸丁酯)的萃取。优化磁固相萃取及解吸条件后,将解吸液引入高效液相色谱-紫外检测分析仪器,采用Purospher~? STAR LP C18色谱柱(250 mm×4.6 mm, 5μm)分离,以甲醇-10 mmol/L醋酸铵水溶液(50∶50, v/v)为流动相进行梯度洗脱。结果表明,目标防腐剂的检出限为0.51~1.89μg/L;苏打水、维生素饮料和方便面面饼中目标防腐剂的加标回收率为72.2%~109%。该方法简单快速,准确可靠,适用于饮料和食品中不同极性防腐剂的分析,为食品安全及质量监控提供了有效的技术有段。展开更多
An ionic liquid bonded polysiloxane(PSOIL) was prepared through the reaction between 1-methylimidazole and γ-chloropropyl-polysiloxane and used as gas chromatography stationary phase for the first time. The column ef...An ionic liquid bonded polysiloxane(PSOIL) was prepared through the reaction between 1-methylimidazole and γ-chloropropyl-polysiloxane and used as gas chromatography stationary phase for the first time. The column efficiency was 3200 plates/m after being conditioned at 210 ℃. Grob reagent,aromatic isomers and homologous series were employed to evaluate the selectivity of the column. The results demonstrate that the PIL stationary phase exerted good selectivity and high separation efficiency.展开更多
文摘通过简单的搅拌共混方式制备了磁性氨基功能化的金属有机骨架化合物(MOFs)材料,得到的复合材料磁性和热稳定性良好,比表面积大,被用于不同极性防腐剂(苯甲酸、山梨酸、对羟基苯甲酸丙酯和对羟基苯甲酸丁酯)的萃取。优化磁固相萃取及解吸条件后,将解吸液引入高效液相色谱-紫外检测分析仪器,采用Purospher~? STAR LP C18色谱柱(250 mm×4.6 mm, 5μm)分离,以甲醇-10 mmol/L醋酸铵水溶液(50∶50, v/v)为流动相进行梯度洗脱。结果表明,目标防腐剂的检出限为0.51~1.89μg/L;苏打水、维生素饮料和方便面面饼中目标防腐剂的加标回收率为72.2%~109%。该方法简单快速,准确可靠,适用于饮料和食品中不同极性防腐剂的分析,为食品安全及质量监控提供了有效的技术有段。
文摘An ionic liquid bonded polysiloxane(PSOIL) was prepared through the reaction between 1-methylimidazole and γ-chloropropyl-polysiloxane and used as gas chromatography stationary phase for the first time. The column efficiency was 3200 plates/m after being conditioned at 210 ℃. Grob reagent,aromatic isomers and homologous series were employed to evaluate the selectivity of the column. The results demonstrate that the PIL stationary phase exerted good selectivity and high separation efficiency.
