氯乙酸甲酯为萃取剂的液\|液半微萃取与胶束电动色谱耦联富集分离中性化合物

报道了采用氯乙酸甲酯作为液-液半微萃取溶剂与胶束电动色谱耦联,通过萃取剂柱上分解来富集分离中性化合物的方法。选取烷基苯酮类（C8, C10 和C11）作为模型化合物,将水中的烷基苯酮类化合物通过液-液半微萃取进入氯乙酸甲酯相中,氯乙酸甲酯相直接进入胶束电动色谱中分离。对于苯乙酮、苯丁酮和苯戊酮的检出限分别为50,50和100 μg/L（S/N≥3）,三者的富集因子达到63～151。本方法只需要有一个毛细管电泳仪而无须特殊设备,省时且操作简便。因此,有很大的潜力用于实际环境样品分析。     

Electrochemical detection of bisphenol A based on Co nanoparticles/N-doped carbon nanotubes compositesEI北大核心CSCD

Co nanoparticles and nitrogen-doped carbon nanotubes （NCNTs）were prepared by calcination of metal-organic material ZIF-67 in a reductive atmosphere of H2 and Ar gas,and modified on the surface of glassy carbon electrod（GCE）for the detection of bisphenol A（BPA）. The Co/NCNTs composites exhibited superior electrocatalytic performance for BPA oxidation owing to the synergistic effect between chemical composition and the specific structure of the Co/NCNTs composites. In optimal conditions,Co/NCNTs/GCE exhibited a linear range of 0.01-20 μµmol/L for BPA（R2=0.998）. The prepared electrode was employed to detect the content of BPA in real samples with the recoveries of 98.4%-104.6%. © 2023, Youke Publishing Co.,Ltd. All rights reserved.