Enoxacin Detection Based on CdTe Quantum-dot-based OFF-ON Fluorescent Probe

LI Man-xiu; ZHANG Qiang; ZHAO San-hu; WU Xia; ZHANG Wei; WANG Cong-cong

doi:10.3788/fgxb20163704.0467

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Enoxacin Detection Based on CdTe Quantum-dot-based OFF-ON Fluorescent Probe

更新时间：2020-08-12

- Enoxacin Detection Based on CdTe Quantum-dot-based OFF-ON Fluorescent Probe
- Chinese Journal of Luminescence Vol. 37, Issue 4, Pages: 467-472(2016)
- 作者机构：
  
  忻州师范学院化学系,山西忻州,034000
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20163704.0467
  CLC： O482.31
- Received：11 December 2015，
  
  Revised：20 January 2016，
  
  Published：05 April 2016
- 稿件说明：
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李满秀, 张强, 赵三虎等. 基于CdTe量子点荧光猝灭-恢复方法测定依诺沙星的研究[J]. 发光学报, 2016,37(4): 467-472

LI Man-xiu, ZHANG Qiang, ZHAO San-hu etc. Enoxacin Detection Based on CdTe Quantum-dot-based OFF-ON Fluorescent Probe[J]. Chinese Journal of Luminescence, 2016,37(4): 467-472
李满秀, 张强, 赵三虎等. 基于CdTe量子点荧光猝灭-恢复方法测定依诺沙星的研究[J]. 发光学报, 2016,37(4): 467-472 DOI： 10.3788/fgxb20163704.0467.

LI Man-xiu, ZHANG Qiang, ZHAO San-hu etc. Enoxacin Detection Based on CdTe Quantum-dot-based OFF-ON Fluorescent Probe[J]. Chinese Journal of Luminescence, 2016,37(4): 467-472 DOI： 10.3788/fgxb20163704.0467.

摘要

水相合成了巯基丙酸保护的CdTe量子点。根据在Cu

存在的情况下

CdTe 量子点荧光恢复程度与依诺沙星浓度成正比的现象

建立了基于CdTe量子点荧光猝灭-恢复测定依诺沙星的新方法。考察了溶液pH 值以及Cu

浓度等对检测体系的影响。在pH=10的硼砂缓冲溶液中

在Cu

浓度为 2.310

-5

mol/L的条件下

依诺沙星浓度在8.010

-7

~3.010

-5

mol/L范围内与量子点荧光恢复程度呈良好的线性关系

检出限为7.210

-8

mol/L。该方法用于实际样品中依诺沙星的检测

回收率为95.5%~105.0%。

Abstract

A new type of water-soluble CdTe quantum dot was synthesized by using mercapto propionic acid as the capping ligand for the detection of enoxacin. The fluorescence intensity of CdTe QDs was significantly quenched in the presence of Cu

. In the presence of enoxacin

the fluorescence of CdTe QDs was recovered because Cu

preferred to react with enoxacin. The degree of recovery of CdTe QDs fluorescence intensity was proportional to the enoxacin concentration

which provided a new method for the detection of enoxacin based on the fluorescence quenching-recovery properties of CdTe QDs. In the presence of 2.310

-5

mol/L Cu

in pH=10 borax buffer solution

the recovered fluorescence of CdTe QDs was linearly related with the enoxacin concentration in the range of 8.010

-7

-3.010

-5

mol/L with a detection limit of 7.210

-8

mol/L. This method has been successfully applied for the detection of enoxacin in real samples

and the accuracy is within 95.5%-105.0%.

关键词

Keywords

references

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