期刊论文

Long, LP

中文

分析化学

0253-3820

2003

31

4

414-419

10.3321/j.issn:0253-3820.2003.04.008

国家***基金 （No .2 982 5 110 ）； 教育部重大课题 （No .2 0 0 0 15 6）资助项目；

本校为第一且通讯机构

苦味酸对固定于聚氯乙烯(PVC)膜中的N,N′-二苄基-3,3′,5,5′-四甲基联苯二胺(TMBD)有可逆荧光猝灭作用,据此研制成测定苦味酸浓度的荧光化学传感器.该传感器敏感膜最佳组成为:50 mg PVC、100 mg 癸二酸二异辛脂(DOS)和6.0 mg TMBD.在0.12 mol/L H2SO4底液中测定苦味酸,其线性响应范围为2.10×10-7～4.00×10-4 mol/L, 检出限为7.8×10-8 mol/L, 其响应时间小于40 s.该传感器具有良好的重现性、可逆性和选择性,其它常见阴离子和阳离子不干扰测定.本方法用来直接测定合成水样中的苦味酸及间接测定药物辛可宁的含量,结果与文献方法一致.

An optical chemical sensor has been developed for the determination of picric acid based on reversible fluorescence quenching of N,N'-dibenzylaniline-3, 3', 5, 5'-tetramethylbenzidine ( TMBD) immobilized in a plasticized polyvinyl chloride (PVC) membrane. The optimum membrane of the sensor consists of 50 mg of PVC, 100 mg of his (2-ethytbexyl) sebacate ( DOS) and 6 0 mg of TMBD. The maximum response of the optode membrane for picric acid was obtained in H2SO4 solution of 0.12 mol/L. With the optimum conditions described, the proposed sensor responds linearly in the measuring range of 2.10 x 10...