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.
引用
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页数：7
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