Mixing-to-Answer Iodide Sensing with Commercial Chemicals
Mixing-to-Answer Iodide Sensing with Commercial Chemicals
复制标题
使用商业化学品混合响应碘化物传感
DOI：
10.1021/acs.analchem.8b02126
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发表时间：
2018
影响因子：
7.4
通讯作者：
Jiang Xingyu
中科院分区：
文献类型：
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作者：
Jia Yuexiao;Zheng Wenshu;Zhao Xiaohui;Zhang Jiangjiang;Chen Wenwen;Jiang Xingyu
我们开发了一种用于快速测定碘（I-）的方便比色测定法（Au/PEI），可以通过混合市售化学品（包括四氯金酸（HAuCl 4）和聚醚酰亚胺）（PEI）来轻松制备，并且可以通过将样品添加到测定中直接进行测定，无需任何预处理和额外程序。Au/PEI的工作原理是，I-加速Au NP的形成，这导致从浅黄色到红色的可见颜色变化，用于具有高特异性的裸眼读出。我们将我们的检测方法集成到固体设备上，包括凝胶杂化物（Au/PEI/GH）和滤纸（Au/PEI纸），以满足即时检测的需求，并通过检测补充有10、20或40 μM I-的湖水中的I-来证明其实用性。检测限为0.35 μM的Au/PEI/GH可以满足基于中国政府设定的指南（1.2 μM）的饮用水检测，并且Au/PEI纸甚至可以在储存1年后使用。此类检测为常规现场I-检测提供了方便和直接的选择。
We develop a convenient, colorimetric assay (Au/PEI) for rapid iodide (I–) determination that can be prepared facilely by mixing commercially available chemicals including tetrachloroauric acid (HAuCl4) and poly(ether imide) (PEI), and the assay can be carried out directly by adding the samples to the assay without any pretreatment and additional procedure. Au/PEI operates on the principle that I–accelerates the formation of Au NPs, which leads to a visible color change from light yellow to red for naked-eye readout with high specificity. We integrate our assay on solid devices including gel hybrids (Au/PEI/GH) and filter paper (Au/PEI paper) to satisfy the demand of point-of-care testing and justify the practicality by detecting I–in lake water that was supplemented with 10, 20, or 40 μM of I–. Au/PEI/GH with the limit of detection of 0.35 μM can satisfy the detection of drinking water based on the guidelines (1.2 μM) set by the Chinese government, and Au/PEI paper can be used even after 1 year of storage. Such assays provide a convenient and straightforward choice for routine, on-site I–tests.