流动注射浊点萃取结合荧光光谱法测定水样中的痕量锌  

Determination of Trace Zinc in Water Samples by Flow Injection Cloud Point Extraction with Fluorescence Spectrometry

作　　者：张立新[1] 刘冰[1] 廉宁[1] 陈翰斌[1] 李敏敏[1] 李广超[1] 吴宏[1] 

机构地区：[1]徐州师范大学化学化工学院

出　　处：《光谱实验室》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)

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%.

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 

分 类 号：O657.32[理学—分析化学]