摘要
研究了新试剂７－（２，４－二羟基－５－羧基苯偶氮）－８－羟基喹啉－５－磺酸（简称ＤＨＣＢＡＱＳ）与铝（Ⅲ）形成的络合物的荧光性能。在ｐＨ４．６２的ＮａＡｃ－ＨＡｃ体系中形成１∶１型强荧光配合物，其λｅｘ＝５１０ｎｍ、λｅｍ＝５７２ｎｍ，铝（Ⅲ）含量在０～０．０８ｍｇ／Ｌ范围内与荧光强度呈线性关系，方法检出限为１．０４×１０－１０ｍｏｌ／Ｌ。本方法用于茶叶、淀粉及水样中痕量铝（Ⅲ）的测定。
A new fluorometric method is reported for the determination of aluminium, based on the complex formation of 7 [(2,4 dihydroxy 5 carboxybenzene)azo] 8 hydroxyquinoline 5 sulfonic acid(DHCBAQS) with aluminium.The complex was formed at pH4.62 with λ ex/em =510nm/572nm.A linear relationship was obtained over the range of 0～0.08mg/L Al(Ⅲ),and the limit of detection for Al(Ⅲ)was 1.04×10 10 mol/L.The method has been applied to determine aluminium in tea,starch and water with satisfactory results.
出处
《分析试验室》
CAS
CSCD
1999年第2期62-64,共3页
Chinese Journal of Analysis Laboratory
基金
江西省自然科学基金
本校基础理论基金
关键词
荧光分析
铝
茶叶
淀粉
DHCBAQS
测定
Fluorescence
aluminium
tea
starch
7 [(2
4 dihydroxy 5 carboxybenzene)azo] 8 hydroxyquinoline 5 sulfonic acid
