摘要
锌离子与8-羟基喹啉混合后与Triton X-114合并,在线生成的锌配合物被表面活性剂Triton X-114捕集保留到脱脂棉微型柱。乙醇洗脱分析物,荧光光谱法检测洗脱液中的痕量锌。考察了影响流动注射浊点萃取体系的各种因素,包括pH、配位剂浓度、表面活性剂浓度、样品富集和洗脱流速等。测定锌的线性范围10—200μg/L,检出限(3σ)为2.0μg/L。方法应用于饮用水和环境水样测定,加标回收率90.4%—107.8%。
Zinc ion was coordinated with 8-hydroxyquinoline,then merged with Triton X-114. The on-line formed complex was trapped by surfactant,and then retained onto a microcolumn packed cotton.Ethanol was introduced to elute the retained analyte,and the trace zinc in the eluent was detected by fluorescence spectrometry.The influences of the various factors including pH, concentrations of 8-hydroxyquinoline and Triton X-114,flow rates of preconcentration and elution on the cloud point extraction efficiency were investigated.The linear range of the detected zinc was 10-200μg/L with the detection limit（3σ） of 2.0μg/L.The developed method was applied to the determination of drinking water and environmental water samples with recoveries in the range of 90.4%-107.8%.
出处
《光谱实验室》
CAS
CSCD
2012年第4期2144-2147,共4页
Chinese Journal of Spectroscopy Laboratory
基金
国家质检总局科技计划项目(2009IK131)
徐州市科技计划项目(XF11C050)
关键词
流动注射
浊点萃取
预富集
锌
荧光光谱法
8-羟基喹啉
Flow Injection
Cloud Point Extraction
Preconcentration
Zinc
FluorescenceSpectrometry
8-Hydroxyquinoline
作者简介
作者简介：张立新（1956-），女，江苏省徐州市人，副教授．主要从事光谱分析研究工作。
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