期刊
MICROCHIMICA ACTA
卷 181, 期 11-12, 页码 1333-1339出版社
SPRINGER WIEN
DOI: 10.1007/s00604-014-1259-9
关键词
Mercury ion; Surface-enhanced Raman scattering; Sensor; Diethynylbenzene
资金
- National Natural Science Foundation of China [21,205,041]
A novel surface-enhanced Raman scattering (SERS) probe was developed for selective determination of Hg(II) ion. It is based on the use of silver nanoparticles (Ag-NPs) modified with the dialkyne 1,4-diethynylbenzene (DEB). Hg(II) undergoes a very selective chemical reaction with the terminal ethynyl groups to form a -C a parts per thousand C-Hg-C a parts per thousand C- linkage which triggers the aggregation of Ag-NPs. This generates numerous hot spots that cause a substantial increase in the intensity of the SERS signal at 2,146 cm(-1). This large effect was exploited for sensitive quantification of Hg(II) in aqueous solution by rationing the intensities of the (Hg-C a parts per thousand C) peak at 2,146 cm(-1) and the (C a parts per thousand C) (free) peak at 2,109 cm(-1). This self-referenced method is superior to the use of an internal standard. The method also displays excellent selectivity over other metal ions. Under optimal conditions, the rationed signal intensity is related to concentration of Hg(II) in the range between 1.1 nM and 61.2 nM, with a detection limit at 0.8 nM. The method was successfully applied to the determination of Hg(II) in spiked samples of river water.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据