Ultrasensitive determination of Cu2+ by synchronous fluorescence spectroscopy with functional nanoparticles

被引：25

作者：

Chen, Hong-Qi ^{[1
]}

Liang, A-Ni ^{[1
]}

Wang, Lun ^{[1
]}

Liu, Yan ^{[1
]}

Qian, Bin-Bin ^{[1
]}

机构：

[1] Anhui Normal Univ, Coll Chem & Mat Sci, Anhui Key Lab Chemobiosensing, Wuhu 241000, Peoples R China

来源：

MICROCHIMICA ACTA | 2009年 / 164卷 / 3-4期

关键词：

Synchronous fluorescence; Trace Cu2+ determination; Nanoparticles; QUANTUM DOTS; VOLTAMMETRIC DETERMINATION; NATURAL-WATERS; PRION PROTEIN; COPPER; SEAWATER; CADMIUM; CU(II); PRECONCENTRATION; DERIVATIVES;

D O I：

10.1007/s00604-008-0082-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new synchronous fluorescence method was developed for the rapid determination of Cu2+ with functional CdS nanoparticles as a probe, based on the fluorescence quenching of functional CdS. The synchronous fluorescence peak is located at 304 nm, scanning with excitation and emission wavelengths of 255 and 460 nm (Delta lambda = lambda (em) aEuroaEuro parts per thousand lambda (ex) = 205 nm), respectively. Under optimum conditions, a linear relationship was found between the relative synchronous fluorescence intensity and the concentration of Cu2+ in the range 0.09 to 27.0 mu g L-1. The limit of detection was 3.2 ng L-1. Compared with other general fluorescent methods for the determination of Cu2+, the proposed method had a wider linear range and improved sensitivity. The quenching mechanism has also been discussed. Moreover, analytical application of the method was successfully demonstrated by analysis water samples.

引用

页码：453 / 458

页数：6

共 37 条

[1] Flame atomic absorption spectrometry determination of trace amounts of copper after separation and preconcentration onto TDMBAC-treated analcime pyrocatechol-immobilized [J].