摘要
以莠去津为模板分子,合成了一种分子印迹荧光纳米材料,并通过荧光分光光度计（MF）、傅里叶红外变换光谱（FT-IR）、高分辨透射电子显微镜（HRTEM）对该材料进行表征。应用其对莠去津进行检测,考察荧光稳定性、结合时间、溶剂p H和选择性吸附对荧光猝灭的影响。在最优条件下,得到莠去津线性范围为0.1-100μmol/L,检出限为0.0012μmol/L。在3种加标浓度（0.5,5和50μmol/L）下,莠去津的回收率分别为89.4%,90.3%和95.6%,相对标准偏差分别为2.6%,3.8%和5.8%（n=5）。
In this work,Mn-doped Zn S quantum dots（ QDs） coated by molecularly imprinted polymers（ MIPs）were synthesized with atrazine as template molecule. The prepared MIPs-coated QDs were characterized by fluorescence spectrophotometer,fourier transform infrared spectrometry and high-resolution transmission electron microscope. This probe has been used to detect atrazine in water samples. The effects of fluorescence stability,binding time,solvent p H and selective adsorption on fluorescence quenching were investigated. Under optimal conditions,this method can detect down to 0. 0012 μmol / L of atrazine in water with a linear range of 0. 1 ~100 μmol / L. The recoveries of atrazine were 89. 4%,90. 3% and 95. 6% with relative standard deviations of2. 6%,3. 8% and 5. 8%（ n = 5） at three adding concentration（ 0. 5,5 and 50 μmol / L）. The studies provided a general strategy to combine molecular imprinting technique and quantum dots,which is simple,rapid and highly selective and pretty desirable for the detection of pesticides in water samples.
出处
《分析试验室》
CAS
CSCD
北大核心
2016年第5期576-580,共5页
Chinese Journal of Analysis Laboratory
基金
中央高校基本科研业务费专项资金(2572014EB06)
东北林业大学大学生科研训练项目(KY2015021)资助
关键词
分子印迹
量子点
荧光猝灭
莠去津
Molecularly imprinting Quantum dot Fluorescence quenching Atrazine
