基于量子点的荧光传感微流纸基芯片离子印迹法检测铜离子  

An Ion Imprinted Polymers Grafted Paper-based Fluorescent Sensor Based on Quantum Dots for Detection of Copper ions

作　　者：王欣然[1,2] 李博伟[2] 尤慧艳[1] 陈令新[2] 

机构地区：[1]大连大学环境与化学工程学院,大连116622 [2]中国科学院海岸带环境过程与生态修复重点实验室,山东省海岸带环境工程技术研究中心,中国科学院烟台海岸带研究所,烟台264003

出　　处：《分析化学》2015年第10期1499-1504,共6页Chinese Journal of Analytical Chemistry

基　　金：十二五国家重大仪器设备开发专项(No.2013YQ17052506);国家自然科学基金(Nos.21205131,21275158)资助项目

摘　　要：基于离子印迹技术,采用3-氨丙基三乙氧基硅烷（APTES）作为功能单体,正硅酸乙酯（TEOS）作为交联剂,以铜离子（Cu2＋）为模板离子,利用表面印迹法在室温下p H=6.5的水溶液中反应,于玻璃纸的表面合成印迹聚合物。玻璃纤维纸的表面经过活化、接氨基处理,接枝碲化镉量子点,成为具有荧光传感性能的基底,而接枝在其表面的离子印迹聚合物增强了体系的选择性,线性范围为0.032~3.20 mg/L,检出限为0.012 mg/L。将其应用于湖水及海水样品中加标Cu2＋含量的检测,并与ICP-MS检测的结果进行了比较,结果表明,这种基于荧光传感的印迹纸芯片具有良好的分析性能。For copper ions（ Cu2 ＋） analysis in environmental samples,a novel highly selective fluorescent sensor was fabricated based on the microfluidic paper-based analytical device to detect Cu2 ＋ions in the aqueous samples. The glass fiber paper was activated using HCl solution and incubated in cadmium telluride（ Cd Te） quantum dots solution to gain a fluorescent substrate. The Cu2 ＋ions imprinted polymers（ Cu-IIP）was synthesized using APTES as a functional monomer and TEOS as a cross-linking agent on the surface of the glass fiber in paper at room temperature. This fluorescent sensor was successfully applied to determine the amount of Cu2 ＋ions in aqueous samples that mainly depended on the electron transition between the Cd Te quantum dots and the Cu2 ＋ions for specific recognition Cu2 ＋ions. A good linearity was presented in the Cu2 ＋concentration range of 0. 032- 3. 20 mg / L,and the limits of detection could be achieved at 0. 012 mg / L.Satisfactory recoveries ranging from 99. 9% to 122. 5% were attained for the spiked seawater and lake water samples with four concentration levels of Cu2 ＋ions. The Cu-IIP@ QDs paper showed a good performance and significant application perspectives for rapid detection of copper ion by comparing with the results of ICP-MS.

关 键 词：纸芯片 离子印迹聚合物 铜离子 碲化镉量子点 

分 类 号：X832[环境科学与工程—环境工程] O657.3[理学—分析化学]