摘要
将 3 羟基 4′ N ,N 二甲氨基黄酮甲基丙烯酸酯与甲基丙烯酸甲酯和丙烯酸丁酯共聚 ,制备了含荧光基团的高聚物 (PFMB) ,以PFMB为敏感膜研制了一种荧光猝灭型的盐酸光纤传感器。在Fe 存在下 ,猝灭效率大大增加 ,猝灭机制主要包括Fe 与Cl- 形成络合物的初级内滤效应和该络合物与PFMB形成非荧光复合物两种作用。该传感器可直接用于 0 .1～ 6.0mol L盐酸的测量。与流动注射联用可测量 0 .1～ 1 2 .0mol L的盐酸。传感器具有良好的重现性和可逆性 ,响应和恢复时间均小于 4 0s。
A new fluorescent polymer poly (3-hydroxy-4'-N, N-dimethylaminoflavone methacrylate-co-methyl methacrylate-co-butyl acrylate) (PFMB) was prepared. It Was used for constructing a new hydrochloric acid sensor. The sensing performance is based on the fluorescence quenching of the PFMB optode membrane by hydrochloric acid. The quenching efficiency is greatly enhanced in the presence of Fe(III). The quenching mechanism includes a primary inner filter effect and the formation of complex between 3-hydroxy-4'- N, N-dimethylaminoflavone group in the PFMB and the Fe(III) with Cl- extracted from hydrochloric acid solution. The sensor can respond hydrochloric acid within 40s in the measuring range of 0.1 to 6.0 mol/L ( combined with flow injection analysis, the measuring range is 1.0 to 12.0 mol/L), and it shows good reversibility, reproducibility and selectivity over some potential interferents. Because of the HMAF covalent bonding to the polymer, the sensor has also a relatively longer lifetime.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2002年第11期1383-1386,共4页
Chinese Journal of Analytical Chemistry
