摘要
研究了８－苯胺基－１－萘磺酸作为表面活性剂胶束荧光探针的性质，并将其用作动力学分析的荧光指示剂。建立了以铁（Ⅲ）催化过氧化氢氧化ＡＮＳ－Ｂｒｉｊ３５体系荧光猝灭反应为基础，用流动注射和光导纤维技术测定痕量铁的动力学分析新方法。该法线性范围为５～３００ｎｇ／ｍＬ，检测下限为２ｎｇ／ｍＬ，绝对检出量为０．２ｎｇ，对２０ｎｇ／ｍＬ铁（Ⅲ）进行１１次测定相对标准偏差为０．２７％，可直接用于人发、纯铝和铝合金中铁的测定。
The properties of anmnonaphthalene-8-sulfonic acid(ANS)as the fluorescentprobe of surface active agent have been studied.The micellar assemblies of ANS-Brij35 hasfirst been used as kinetic indicator of fluorescence.A new method using flow injection analysis(FIA) and fiber optic to determine iron(Ⅲ)has been developed based upon the fluorescence quenching of ANS-Brij35 by the oxidation of hydrogen peroxide, in which the iron(Ⅲ)is an effective catalyst. The linear calibration curve of iron(Ⅲ)is obtained in the range of 5～300 ng/mL. The limit of detection is 2 ng/mL and the absolute detection limit is 0.2ng.The relative standard deviation is 0.27%(n=11)at the level of 20 ng/mL iron(Ⅲ). Thismethod has been applied to the determination of iron in human hair, aluminum and aluminumalloy without pre-separation.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第4期535-538,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
铁
荧光探针
流动注射分析
人发
铝合金
纯铝
Iron,Fluorescent probe, Catalytic kinetics, Flow injection analysis, Fiber opticspectrometry
