Laser-induced breakdown spectroscopy mediated amplification sensor for copper (II) ions detection using click chemistry
文献类型： 外文期刊
作者： Cao, Fengjing 1 ; Jiao, Fu 1 ; Ma, Shixiang 1 ; Dong, Daming 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Natl Res Ctr Intelligent Equipment Agr, Beijing 100097, Peoples R China
2.Guangxi Univ, Guangxi Key Lab Intelligent Control & Maintenance, Nanning 530004, Peoples R China
关键词： Laser -induced breakdown spectroscopy; Ag nanoparticles; Click chemistry; Copper(II) ions detection
期刊名称：SENSORS AND ACTUATORS B-CHEMICAL （ 影响因子：9.221； 五年影响因子：7.676 ）
ISSN：
年卷期： 2022 年 371 卷
页码：
收录情况： SCI
摘要： New strategies for super-sensitive detection of toxic heavy-metal-ion pollutants are urgently needed. Here, we outline a simple and highly sensitive assay for copper(II) ions. The method is based on click chemistry and uses laser-induced breakdown spectroscopy (LIBS) as the readout method. Copper(I) ions formed in situ by the reduction of copper(II) ions in the presence of sodium ascorbate (AA) can catalyze the cycloaddition reaction between an alkyne and an azide (CuAAC). In the presence of copper(II) ions and AA, the AgNPs-BSA-Azide can be clicked with the BSA-Alkyne via a cycloaddition reaction to form a BSA-triazole-BSA-AgNPs sandwich conjugate based on this CuAAC&LIBS system. The intensity of the LIBS signal from the residual AgNPs-BSA-Azide in the supernatant is inversely proportional to the concentration of copper(II) ions. The sensor shows a good detection limit of 0.045 nM and a linear relationship between copper ions concentration and the LIBS signal. This click -based method will broaden the potential applications of LIBS for metal detection in drinking water and environment.
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