痕量铜离子光化学传感器的设计与研制  

Design and Development of the Trace Cu^(2+) Optical Chemistry Sensor

作　　者：张浩东[1,2] 郑守国[1] 李淼[1] 石怀文[1] 张健[1,3] 高会议[1] 

机构地区：[1]中国科学院合肥物质科学研究院,安徽合肥230031 [2]中国人民解放军陆军军官学院,安徽合肥230031 [3]无锡中科智能农业发展有限公司,江苏无锡214105

出　　处：《光谱学与光谱分析》2012年第12期3411-3415,共5页Spectroscopy and Spectral Analysis

基　　金：国家(863计划)项目(2011AA100704);江苏省第八批"六大人才高峰"项目(2011-wlw-005);江苏省科技支撑计划项目(BE2011432)资助

摘　　要：针对量子点荧光猝灭法检测Cu2+大多通过实验室化学分析或大型仪器检测而难以满足现场检测需求的问题,设计了一种可用于现场检测的痕量Cu2+光化学传感器,主要包括光学感知模块与信号处理模块,光学感知模块完成激光光源的输出与荧光的激发,信号处理模块完成微弱荧光信号的光电转换、信号放大、数据处理与显示。利用自行研制的光电采集、转换与信号处理系统完成痕量Cu2+的快速检测,实现了检测仪器的小型化与低成本。实验结果表明,在Cu2+浓度30～1 000nmol.L-1范围内传感器检测结果具有较好的线性关系,拟合后的直线方程为y=0.109 77x+11.872 32,线性度为0.994 82,标准方差3.994 24,检测下限达到30nmol.L-1,传感器响应时间为40s,实验测定了其他共存离子对Cu2+检测结果的干扰,实验结果表明该传感器可以满足痕量Cu2+现场检测的需求。The present paper proposes an optical chemistry sensor used for real-time detection of trace Cu2＋ , including the opti- cal perception module and the signal processing module. The optical perception module gives the output of the laser light and excitation of fluorescence. The signal processing module completes optoelectronic conversion and amplification of the weak fluo- rescence signal as well as data processing and display. A self-developed optical acquisition, conversion and processing system was used to complete rapid detection of trace Cuz＋ , miniaturizing and reducing the cost of the testing instruments. The experimental results show the proposed sensor responds linearly in a concentration range of 30-1 000 nmol · L-1 , with the linear equation y=0. 109 77x＋11. 872 32, the linearity 0. 994 82, the standard deviation 3. 994 24, the detection limit 30 nmol · L-1 , and the response time of the sensor 40 seconds. The experiment determines the interference of other ions with the Cu2＋ test results. It shows that this sensor meets the demand of field detection for trace Cu2＋ site testing.

关 键 词：CDTE量子点 重金属检测 荧光猝灭 光化学传感器 

分 类 号：O657.3[理学—分析化学]