摘要
基于Ａｌ（Ⅲ）与３，５－二溴水杨醛缩邻氨基酚（简称ＢＳＡＰ）和溴化十六烷基三甲胺（ＣＴＭＡＢ）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ｐＨ３．８～４．５的醋酸铵缓冲介质和ＣＴＭＡＢ存在下，Ａｌ（Ⅲ）与ＢＳＡＰ形成１：１的络合物。在λｅｘ＝３５５ｎｍ、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０～０．８αｇ／２５ｍＬ，检测限为０．２５ｕｇ／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。
A new fluorescence quenching method for the determination of trace aluminium has been developed.This method is based on the quenching of fluorescenceof 3, 5-dibromosalicylaldehyde-o-aminophenol(BSAP)cetyltrimethylammonium bromide (CTMAB ) systemdue to aluminium complex formation. In NH4Ac buffermedium at PH 3. 8 ～ 4. 5 and in the presence ofCTMAB, Al (Ⅲ ) reacts with BSAP to form a 1: 1complex. The maximal excitation and emission wavelengths were found to be 355 and 535 nm, respectively. The linear range is 0～0. 8μg/25mL for Al (Ⅲ),and the detection limit is 0. 25ng/mL. The method has been applied to the direct determination of trace a luminium in water, steel alloys and antistatic agentwith satisfactory results.
出处
《化学试剂》
CSCD
北大核心
1996年第3期162-164,共3页
Chemical Reagents
关键词
铝
荧光熄灭法
BSAP
席夫碱
aluminium
3
5-dibromosalicylaldehyde-oaminophenol
fluorescence quenching method
