Colorimetric aggregation assay for arsenic(III) using gold nanoparticles

被引：70

作者：

Gong, Lingling ^{[1
]}

Du, Bibai ^{[1
]}

Pan, Long ^{[1
]}

Liu, Qingju ^{[1
]}

Yang, Kunhao ^{[1
]}

Wang, Wei ^{[1
]}

Zhao, Hong ^{[1
]}

Wu, Li ^{[1
]}

He, Yujian ^{[1
]}

机构：

[1] Univ Chinese Acad Sci, Sch Chem & Chem Engn, 380 JingJia Rd, Beijing 100049, Peoples R China

来源：

MICROCHIMICA ACTA | 2017年 / 184卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Determination of As(III); Transmission electron microscopy; ICP-OES; Visual test; Spiking; Dialysis; Environmental analysis; AQUEOUS-SOLUTION; DRINKING-WATER; ICP-MS; SPECIATION; SCATTERING; APTAMERS; SAMPLES; POLYNUCLEOTIDES; SPECTROMETRY; GROUNDWATER;

D O I：

10.1007/s00604-017-2122-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The authors describe a colorimetric assay for the determination of As(III) in aqueous solution using citrate capped gold nanoparticles (AuNPs) which, in the presence of As(III), undergo aggregation due to the interaction of citrate ion with As(III). This results in an easily detectable color change from wine-red to blue. The ratio of the absorbances at 661 and 519 nm is linearly related to the As(III) concentration in the 4 to 100 ppb range, with a detection limit as low as 1.8 ppb (at 3 sigma) which is below the guideline value of 10 ppb. The method is rather simple in that it does not require the surface of the AuNPs to be modified. It was successfully applied to the determination of As(III) in spiked drinking water where it gave adequate recoveries.

引用

页码：1185 / 1190

页数：6

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