使用聚乙二醇化金纳米粒子比色法和目测法测定三价金离子
Colorimetric and visual determination of Au(III) ions using PEGylated gold nanoparticles.
机构信息
School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
Stake Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, 100191, China.
出版信息
Mikrochim Acta. 2018 Jan 10;185(2):95. doi: 10.1007/s00604-017-2648-7.
A highly selective method is described for the colorimetric determination of Au(III) ions in acidic solution using gold nanoparticles (AuNPs) functionalized with thiolated methoxy poly(ethylene glycol) (mPEG). The presence of Au(III) induces the aggregation of the PEG-AuNPs, and this is accompanied by a color change from wine red to blue, and a decrease in absorbance at 525 nm. This can be monitored spectrophotometrically and visually. Absorbance at 525 nm linearly drops in the 0.50 to 1.75 mg·L Au(III) concentration range, with a 0.25 mg·L detection limit. The method is surprisingly selective over other metal ions. It was successfully applied to the analysis of ore samples. Graphical Abstract ᅟ.
一种高选择性的方法被描述用于在酸性溶液中使用巯基化甲氧基聚乙二醇（mPEG）功能化的金纳米粒子（AuNPs）比色测定 Au(III)离子。Au(III)的存在诱导 PEG-AuNPs 的聚集，这伴随着颜色从酒红色变为蓝色，以及在 525nm 处的吸光度降低。这可以通过分光光度法和目视法进行监测。在 0.50 至 1.75mg·L Au(III)浓度范围内，525nm 处的吸光度呈线性下降，检测限为 0.25mg·L。该方法对其他金属离子具有惊人的选择性。它已成功应用于矿石样品的分析。
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