Simple optical determination of silver ion in aqueous solutions using benzo crown-ether modified gold nanoparticles

被引：41
|
作者：
Haghnazari, Nahid [1 ]
Alizadeh, Abdolhamid [2 ,3 ]
Karami, Changiz [4 ]
Hamidi, Zohreh
机构：
[1] Islamic Azad Univ, Dept Biochem, Sanandaj Branch, Sanandaj, Iran
[2] Razi Univ, Dept Chem & Nanosci, Kermanshah 67149, Iran
[3] Razi Univ, Nanotechnol Res Ctr NNRC, Kermanshah 67149, Iran
[4] Islamic Azad Univ, Dept Chem, Kermanshah Branch, Kermanshah, Iran
来源：
MICROCHIMICA ACTA | 2013年 / 180卷 / 3-4期
关键词：
Nano sensors; Gold nanoparticles; Benzo-15-crown-5; Colorimetric sensing; Heavymetals; Silver sensor; COLORIMETRIC DETECTION; CHEMISTRY; SENSOR;
D O I：
10.1007/s00604-012-0928-9
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
We describe a method for the modification of gold nanoparticles (Au-NPs) with benzo-15-crown-5 that led to the development of a colorimetric assay for Ag(I) ion. The brown color of a solution of the modified Au-NPs turns to purple on addition of Ag(I) ion. The ratio of the UV-vis absorption at 600 nm and 525 nm is proportional to the concentration of Ag(I) ions in the range from 20 to 950 nM, and the detection limit is 12.5 nM. Other metal ions do not interfere if present in up to millimolar concentrations. The method enables a rapid determination of Ag(I) in lake and drinking water and is amenable to bare-eye readout.
引用
收藏
页码：287 / 294
页数：8
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