摘要
苦味酸水浴液对固定在增塑的聚氯乙烯（ＰＶＣ）膜中的蒽有可逆荧光熄灭作用，据此研制了测定苦味酸的荧光光化学传感器。该传感器的敏感膜的最佳组成为６～８ｍｇ蒽、５０ｍｇＰｖＣ粉、１００ｍｇ邻苯二甲酸二异辛酯。测定苦味酸的浓度范围为３．０４×１０￣（－６）～６．１６×１０￣（－３）ｍｏｌ／Ｌ，重现性良好，响应时间为５～４０秒，该传感器选择性好，许多常见亲脂明离子不干扰测定，可用于药物奎宁及辛可宁的间接测定。
A new optical sensor for the determination of picric acid based on reversible fluo-rescence quenching of anthracene dissolved in plasticized poly(vinyl chloride)membrane hasbeen developed. The optimum membrane of the sensor consists of 6～8mg anthracene, 50mgPVC,100mg bis(2-ethylhexyl)phalate. With the optimum membrane described,picric acidin sample solutions from 3.04× 10￣(-6)mol/L to 6.16 ×10￣(-3)mol/L can be determined.Besidesa high reproducibility of the optical signals,the very short response times of less than 40sare realized. The sensor has a good selectivity, common hydrophobic anions do not interferethe determination. The sensor has been applied to indirect determination of some drugs,such as quinine,cinchonine,with satisfactory results.
出处
《应用化学》
CAS
CSCD
北大核心
1994年第2期48-52,共5页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金及国家教委优秀年轻教师基金资助课题
关键词
苦味酸
光化学传感器
蒽
药物分析
picric acid,optical sensor,anthracene,pharmaceutical analysis
