摘要
本文基于Ａｌ（Ⅲ）与３，５－二溴水杨醛缩邻氨基酚和溴化十六烷基三甲胺形成络合物导致体系荧光熄灭的特性，提出了一种测定痕量Ａｌ（Ⅲ）的新荧光方法。在ｐＨ＝３．８～４．５的醋酸铵缓冲介质和溴化十六烷基三甲胺存在下，Ａｌ（Ⅲ）与３，５－二溴水杨醛缩邻氨基酚形成１：１的络合物。在λｅｘ＝３５５，λｅｍ＝５３５ｎｍ的条件下，体系产生的荧光熄灭程度最大，铝量的线性范围为０～０．８μｇ／ｍｌ，检测限为０．２５ｎｇ／ｍｌ。方法用于水样、合金钢及抗静电油剂中铝的测定，结果满意。
The fluoresence quenching effect for the determination of trace alminium has been developed.This method is based on the quenching of fluorescence of 3,5-dibromosalicylal dshyde-o-aminophenol(BSAP)-cetyltrimethylammoniumbromide(CTMAB)system due to aluminium complex formation.The optimum pH range for the determination of fluorescence is 3.8～4.5 in buffer mediuni of NN4Ac and in the presence of CTMAB,Al(Ⅲ)reacts with BSAP to form a 1:1 complex.The maximal excitation and emission wavelengths were found to be 355 and 535nm,respectively.The liner range is 0～0.8μg/ml for Al(Ⅲ),and the detection limit is 0.25 μg/ml.The method has been applied to determination of trace aluminium in water,steel alloys and electrostaticresisting oil with satisfactory results.
出处
《济宁医学院学报》
1996年第2期1-3,共3页
Journal of Jining Medical University
关键词
铝
席夫碱
荧光熄灭法
BSAP
合成
Aluminium
3
5-Dibromosalicyladehyde-o-aminophenol
Fluorescence quenching
