摘要
本文研究了新试剂 7 (2 ,4 二羧甲氧基 5 羧基苯偶氮 ) 8 羟基喹啉 5 磺酸 (简称DCOBAQS)与铝(Ⅲ )形成的络合物的荧光性能。在 pH 5 5 4的HAc NaAc体系中试剂与铝形成 2∶1型强荧光配合物 ,其 λex=5 10nm、λem =5 72nm ,铝 (Ⅲ )含量在 0～ 0 0 4μg·mL-1范围内与荧光强度呈线性关系 ,方法检出限为0 5 5 7ng·mL-1。本文用此方法对茶叶中痕量铝 (Ⅲ )进行测定 ,结果满意。
A new fluorometric method is reported for the determination of aluminium,based on the complex forming of 7-[(2,4-dicarboxymethyl-5-carboxybenezene) azo]-8-hydroxyquinoline-5-sulfonic (DCOBAQS) with aluminium. The complex was formed at pH 5.54 with lambda (ex)/lambda (em) = 510 nm/572 nm. A better line relationship curve was obtained over the range of 0-0.04 mug.mL(-1) Al( III ), and the detection limit for Al( III ) is 0.557 ng.mL(-1). The method is applied to determination aluminium in tea with satisfactory results.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2001年第1期92-94,共3页
Spectroscopy and Spectral Analysis
基金
江西省自然科学基金资助项目
