Colorimetric detection of iron (II) using 4-mercaptobenzoic acid and 3,3′,5, 5′-tetramethylbenzidine modified silver nanoparticles

被引：9
|
作者：
Li, Zhongqiu [1 ,3 ]
Ti, Mengru [1 ]
Yang, Kunhao [1 ]
Li, Xiangjun [1 ]
Wu, Li [1 ]
He, Yujian [1 ,2 ]
机构：
[1] Univ Chinese Acad Sci, Sch Chem Sci, 19A Yuquanlu, Beijing 100049, Peoples R China
[2] Peking Univ, State Key Lab Nat & Biomimet Drugs, Beijing 100191, Peoples R China
[3] Hebei Univ Sci & Technol, CCPE, Shijiazhuang 050000, Hebei, Peoples R China
来源：
MICROCHEMICAL JOURNAL | 2019年 / 151卷
基金：
北京市自然科学基金; 中国国家自然科学基金;
关键词：
Colorimetric detection; Silver nanoparticles; 4-Mercaptobenzoic acid (4-MBA); 3,3 ',5,5 '-Tetramethylbenzidine (TMB); Iron (II); GOLD NANOPARTICLES; FLUORESCENT-PROBE; FENTON REACTION; FE2+; FE(III); WATERS; CU2+; IONS; ESTUARINE; ELECTRODE;
D O I：
10.1016/j.microc.2019.104254
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this work, a novel method for the colorimetric detection of iron (II) by using modified silver nanoparticles was developed. In the detection system, AgNPs were modified with 4-mercaptobenzoic acid (4-MBA) and 3,3',5,5'-tetramethylbenzidine (TMB) to form 4-MBA-TMB-AgNPs. The presence of iron (II) caused the aggregation of 4-MBA-TMB-AgNPs through metal-ligand coordination, accompanied by solution color changing from gray-white to purple. Several factors including the ratio of the two modifiers and pH value were optimized. Under optimal conditions, this method showed a good linear from 1.00 x 10(-6) M to 2.00 x 10(-4) M with a correlation coefficient (R-2) of 0.9966 and the detection limit was as low as 1.00 mu M. The method has a great potential for the rapid detection of iron (II) in environmental samples. Particularly, this was successfully applied to the determination of the iron (II) in tap and lake water samples.
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页数：7
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