应用化学 ›› 2022, Vol. 39 ›› Issue (8): 1303-1311.DOI: 10.19894/j.issn.1000-0518.210399

• 研究论文 • 上一篇    下一篇

水体中铜离子的现场可视化半定量快速检测

徐凤州1,2,3(), 唐华英1, 刘吴荟1, 江怡凤1, 李文凯1, 陆献海1   

  1. 1.莆田学院环境与生物工程学院,莆田 351100
    2.莆田学院福建省新型污染物生态毒理效应与控制重点实验室,莆田 351100
    3.莆田学院生态信息图谱福建省高校重点实验室,莆田 351100
  • 收稿日期:2021-08-09 接受日期:2021-11-15 出版日期:2022-08-01 发布日期:2022-08-04
  • 通讯作者: 徐凤州
  • 基金资助:
    福建省自然科学基金(2020J05209);福建省教育厅中青年教师教育科研项目(JAT190569);莆田学院引进人才科研启动费项目(2019116);福建省大学生创新创业训练计划项目(S202011498013)

A Visual Semi⁃quantitative Method for Rapid Detection of Copper Ion in Water

Feng-Zhou XU1,2,3(), Hua-Ying TANG1, Wu-Hui LIU1, Yi-Feng JIANG1, Wen-Kai LI1, Xian-Hai LU1   

  1. 1.College of Environmental and Biological Engineering,Putian University,Putian 351100,China
    2.Fujian Provincial Key Laboratory of Ecology-toxicological Effects & Control for Emerging Contaminants,Putian University,Putian 351100,China
    3.Key Laboratory of Ecological Environment and Information Atlas,Fujian Province University,Putian University,Putian 351100,China
  • Received:2021-08-09 Accepted:2021-11-15 Published:2022-08-01 Online:2022-08-04
  • Contact: Feng-Zhou XU
  • About author:xufengzhou520@163.com
  • Supported by:
    the Natural Science Foundation of Fujian Province(2020J05209);the Education and Scientific Research Project for Young and Middle?aged Teachers of Fujian Province(JAT190569);the Scientific Research Start?up Project of Putian University(2019116);the University Students Innovation and Entrepreneurship Training Plan of Fujian(S202011498013)

摘要:

铜是常见重金属污染物之一。开发现场快速检测方法在污染事件的应急检测中至关重要,可为及时采取有效的防治措施提供数据支持。基于脱氧核糖核酸(DNA)稳定的荧光铜纳米颗粒的快速合成以及对铜离子的高特异性,研制了一种紫外光辅助下的铜离子现场快速荧光比色检测方法。经过一系列条件的优化,最终选择以600 nmol/L poly(AT-TA)双链DNA为螯合配位保护剂,2 mmol/L抗坏血酸钠为还原剂,在3-(N-吗啡啉)丙磺酸(MOPS)溶液体系中合成荧光铜纳米颗粒,在便携式紫外手电筒的辅助下,肉眼(佩戴防紫外护目镜)即可观察到铜纳米颗粒橙红色的荧光。在半定量检测中,根据待测样中铜离子浓度的大小,其荧光亮度不同,以不同浓度标准溶液铜离子合成的荧光比色标准系列进行比色,即可实现环境中铜污染水体的现场、肉眼、半定量、快速(<10 min)检测。本方法的肉眼检测最低值为1.5 mg/L(24 μmol/L),符合《污水综合排放标准》(GB 8978-1996)中的三级排放标准值。该方法可为在环境水体铜污染应急事件中的快速现场检测提供一种参考方法。

关键词: 铜离子, 荧光铜纳米颗粒, 荧光比色, 可视化检测

Abstract:

Copper is one of the heavy metal pollutants. The development of point of care testing (POCT) is necessary in the emergency detection of pollution events, which can avoid the spread of the contaminated area. Based on DNA-stabilized fluorescent copper nanoparticles (CuNPs), a ultraviolet(UV)-assisted POCT (fluorescence colorimetric) was developed for detection of Cu2+. In this method, after optimization of conditions, CuNPs were synthesized in the MOPS solution using 600 nmol/L poly(AT-TA) dsDNA as the scaffold and 2 mmol/L sodium ascorbate as the reducing agent. With the aid of a UV flashlight, the red-orange fluorescence of CuNPs is visible to naked-eye (wearing anti-UV goggles). Also, the fluorescence brightness varies with the concentration of Cu2+. Based on this strategy, a semi-quantitative detection method for Cu2+ was developed, i.e., the concentration range of Cu2+ in the water-sample could be detected by fluorescent colorimetry with standard series. The LOD of the method is 1.5 mg/L (24 μmol/L), which meets the requirements of third-level of discharge standard in the Comprehensive Sewage Discharge Standard (GB 8978-1996). This method is a new semi-quantitative, visual point of care testing for Cu2+, which can provide a reference method for rapid on-site detection of copper pollution in environmental water.

Key words: Copper ions, Copper nanoparticles, Fluorescence colorimetry, Visualization

中图分类号: