变色酸荧光光度法测定自来水中痕量Al(Ⅲ)  

Spectrofluorimetric Determination of Al(Ⅲ)in Tap Water by Using Chromotropic Acid

作　　者：顾佳丽[1] 伊鲁东 李东玲 胡雪健 赵恒 赵刚[1] GU Jia-li;YI Lu-dong;LI Dong-ling;HU Xue-jian;ZHAO Heng;ZHAO Gang(College of Chemistry ＆ Chemical Engineering,Bohai University,Jinzhou 121013)

机构地区：[1]渤海大学化学化工学院,辽宁锦州121013

出　　处：《分析科学学报》2018年第5期664-668,共5页Journal of Analytical Science

基　　金：国家自然科学基金(No.21676028);2016年国家级大学生创新创业训练计划(No.201610167078)

摘　　要：研究表明Al(Ⅲ)能与变色酸1,8-二羟基萘-3,6-二磺酸形成配合物,导致体系的荧光增强,由此建立了测定Al(Ⅲ)的荧光光度分析新方法。在单因素试验的基础上,采用响应面分析法建立二次回归模型,得到方法的最佳测定条件为:pH=4.5,变色酸浓度为8.0×10-5 mol·L^(-1),甲醇浓度为40%。该方法测定Al(Ⅲ)的线性范围为5~70μg·L^(-1),检出限为1.1μg·L^(-1)。用于测定自来水中痕量Al(Ⅲ),其相对标准偏差为1.3%~5.7%,加标回收率为93.6%~107.2%。Al（Ⅲ）can form complex with chromotropic acid（1,8-dihydroxynaphthlene-3,6-disulfonic acid）to enhance fluorescence intensity,based on which a new method to determine trace aluminium has been established.On the basis of single-factor experiments,quadric polynomial regression model was established by response surface methodology.The optimum experimental conditions were pH=4.5,the content of chromotropic acid of 8.0×10^（-5） mol/L and the content of methanol of 40%.The linear range of aluminium was 5-70μg·L^（-1）,and the detection limit was 1.1μg·L^（-1）.This method could be applied to the determination of trace aluminium in tap water.The relative standard deviation was 1.3%-5.7%and recovery was 93.6%-107.2%,respectively.

关 键 词：铝 1 8-二羟基萘-3 6-二磺酸 荧光光度法 

分 类 号：O657.39[理学—分析化学]