Simple and sensitive determination of Cr (III), Cu (II) and Pb (II) in tea infusions using AgNPs-modified resin combined with laser-induced breakdown spectroscopy
文献类型： 外文期刊
作者： Wen, Xuelin 1 ; Cao, Fengjing 2 ; Yang, Chongshan 2 ; Gao, Zhen 2 ; Tian, Hongwu 2 ; Zhao, Xiande 2 ; Guo, Lianbo 1 ; Ma, Shixiang 2 ; Dong, Daming 2 ;
作者机构： 1.Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect WNLO, Wuhan 430074, Hubei, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Res Ctr Intelligent Equipment, Beijing 100097, Peoples R China
3.Minist Agr & Rural Affairs, Key Lab Agr Sensors, Beijing 100097, Peoples R China
4.Guilin Univ Technol, Coll Geomat & Geoinformat, Guilin 541004, Peoples R China
关键词： Tea infusion; Heavy metal ions; Nanoparticles-modified; Laser-induced breakdown spectroscopy
期刊名称：FOOD CHEMISTRY （ 影响因子：8.8； 五年影响因子：8.6 ）
ISSN： 0308-8146
年卷期： 2024 年 448 卷
页码：
收录情况： SCI
摘要： The detection of heavy metals in tea infusions is important because of the potential health risks associated with their consumption. Existing highly sensitive detection methods pose challenges because they are complicated and time-consuming. In this study, we developed an innovative and simple method using Ag nanoparticles-modified resin (AgNPs-MR) for pre -enrichment prior to laser -induced breakdown spectroscopy for the simultaneous analysis of Cr (III), Cu (II), and Pb (II) in tea infusions. Signal enhancement using AgNPs-MR resulted in amplification with limits of detection of 0.22 mu g L -1 for Cr (III), 0.33 mu g L -1 for Cu (II), and 1.25 mu g L -1 for Pb (II). Quantitative analyses of these ions in infusions of black tea from various brands yielded recoveries ranging from 83.3% to 114.5%. This method is effective as a direct and highly sensitive technique for precisely quantifying trace concentrations of heavy metals in tea infusions.
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