高选择性荧光试剂：7－（8－喹啉偶氮）－8－羟基喹啉－5－磺酸测定痕量铝

Determination of Trace Aluminum Using High Selective Fluorescent Reagent:7-(8-Quinolylazo)-8-Hydroxyquinoline-5-Sulfonic Acid

本文合成了一种新的测定铝的高选择性的荧光试剂：７－（８－喹啉偶氮）－８羟基喹啉－５－碘酸（ＱＡＨＱＳ）。在弱酸性介质（ｐＨ５．２）中，试剂能与铝离子形成发黄色荧光的络合物，其荧光峰位于４９０ｎｍ。反应具有较高的灵敏度和选择性。利用此反应建立了一种新的测定痕量铝的新方法。其检出限可达到２０ｎｇ／ｍｌ。方法用于无机盐试剂及水中痕量铝的测定。

A high selective fluorescent reagent 7-(8-quinolylazo)-8-hydroxyquinoline-5-sulfonic acid has been synthesized. In the weak acidic medium (pH5.2) the reagent could form a yellow fluorescent complex exhibiting a maximum of emission fluorescence spectrum at 490nm. The reaction showed high selectivity and sensitivity for aluminium ions. A new spectrofluorimetric method for the determination of trace aluminium using above mentioned reagent has been developed. The detection limit of the method has been found to be 2.0ng/ml. The method could be used to determine aluminium in some inorganic chemicals and water samples. The results found were satisfied.