Determination of chromium(VI) by surface plasmon field-enhanced resonance light scattering

被引：98

作者：

Han, Zhiqiang ^{[1
]}

Qi, Li ^{[1
]}

Shen, Gangyi ^{[1
]}

Liu, Wei ^{[1
]}

Chen, Yi ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Lab Analyt Chem Life Sci, Beijing 100080, Peoples R China

来源：

ANALYTICAL CHEMISTRY | 2007年 / 79卷 / 15期

关键词：

D O I：

10.1021/ac062453d

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A surface plasmon-enhanced resonance light scattering method has been developed. The method features strong light scattering but very weak background, and after incorporating with selective sample extraction and ion-association complexation using rhodamine B and KI as reactants, it could selectively determine Cr(VI) in both of standard and real samples, reaching a limit of detection down to 20 nM which is about 40-fold as sensitive as flame atomic absorption spectrometry and 140-fold as sensitive as fluorescent spectroscopy. Its linear working range was found in between 40 and 320 nM, with a relative standard deviation of peak height at < 3% (n = 5) and recovery between 94.8-104.9%. In theory, the method is applicable to the analysis of all substances able to produce or destroy I-2.

引用

页码：5862 / 5868

页数：7

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