Highly sensitive detection of chromium (III) ions by resonance Rayleigh scattering enhanced by gold nanoparticles

被引：66

作者：

Chen, Min ^{[1
,2
]}

Cai, Huai-Hong ^{[3
]}

Yang, Fen ^{[3
]}

Lin, Dewen ^{[3
]}

Yang, Pei-Hui ^{[3
]}

Cai, Jiye ^{[3
]}

机构：

[1] Jinan Univ, Dept Pulm Med, Affiliated Hosp 1, Guangzhou 510630, Guangdong, Peoples R China

[2] Guangdong Med Coll, Inst Resp Dis, Zhanjiang 524001, Peoples R China

[3] Jinan Univ, Dept Chem, Guangzhou 510632, Guangdong, Peoples R China

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2014年 / 118卷

关键词：

Cr3+ ion; Gold nanoparticles; Sensors; Resonance; Rayleigh scattering; Nanoparticle aggregates; SPECIATION; SAMPLES; CR(III); ASSAY; PROBE; CYTOTOXICITY; HEPARIN; CR(VI); WATER;

D O I：

10.1016/j.saa.2013.09.058

中图分类号：

O433 [光谱学];

学科分类号：

070207 [光学];

摘要：

Simple and sensitive determination of chromium (III) ions (Cr3+) has potential applications for detecting trace contamination in environment. Here, the assay is based on the enhancement of resonance Rayleigh scattering (RRS) by Cr3+-induced aggregation of citrate-capped gold nanoparticles (AuNPs). Transmission electron microscopy (TEM) and UV-vis absorption spectroscopy were employed to characterize the nano-structures and spectroscopic properties of the Cr3+-AuNP system. The experiment conditions, such as reaction time, pH value, salt concentration and interfering ions, were investigated. The combination of signal amplification of Cr3+-citrate chelation with high sensitivity of RRS technique allow a selective assay of Cr3+ ions with a detection limit of up to 1.0 pM. The overall assay can be carried out at room temperature within only twenty minutes, making it suitable for high-throughput routine applications in environment and food samples. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：776 / 781

页数：6

共 35 条

[1]

Simultaneous determination of arsenic, cadmium, copper, chromium, nickel, lead and thallium in total digested sediment samples and available fractions by electrothermal atomization atomic absorption spectroscopy (ET AAS) [J].