利用 AgNPs 修饰树脂结合激光诱导击穿光谱法对茶浸提液中 Cr(III)、Cu(II)和 Pb(II)的简单灵敏测定。
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.
机构信息
Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, Wuhan, Hubei 430074, China; Research Center of Intelligent Equipment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; College of Geomatics and Geoinformation, Guilin University of Technology, Guilin 541004, China.
Research Center of Intelligent Equipment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; Key Laboratory of Agricultural Sensors, Ministry of Agriculture and Rural Affairs, Beijing 100097, China.
出版信息
Food Chem. 2024 Aug 1;448:139210. doi: 10.1016/j.foodchem.2024.139210. Epub 2024 Mar 31.
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 μg L for Cr (III), 0.33 μg L for Cu (II), and 1.25 μg L 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.
茶叶浸出液中重金属的检测很重要，因为其摄入与潜在健康风险相关。现有的高灵敏度检测方法存在挑战，因为它们复杂且耗时。在这项研究中，我们开发了一种创新且简单的方法，使用银纳米粒子修饰的树脂（AgNPs-MR）进行预富集，然后结合激光诱导击穿光谱法，用于同时分析茶叶浸出液中的 Cr（III）、Cu（II）和 Pb（II）。AgNPs-MR 的信号增强导致检测限分别为 0.22μg L 对于 Cr（III）、0.33μg L 对于 Cu（II）和 1.25μg L 对于 Pb（II）进行放大。对来自不同品牌的红茶浸出液中这些离子的定量分析，回收率范围为 83.3%至 114.5%。该方法是一种直接且高灵敏度的技术，可用于精确定量茶叶浸出液中痕量重金属的浓度。
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