Chemiluminescence behaviour of CdTe-potassium permanganate enhanced by sodium hexametaphosphate and sensitized sensing of L-ascorbic acid

被引：11

作者：

Chen, Hongqi ^{[1
]}

Ling, Bo ^{[1
]}

Yuan, Fei ^{[1
]}

Zhou, Cailing ^{[1
]}

Chen, Jingguo ^{[1
]}

Wang, Lun ^{[1
]}

机构：

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

来源：

LUMINESCENCE | 2012年 / 27卷 / 06期

关键词：

CdTe; sodium hexametaphosphate; potassium permanganate; L-ascorbic acid; determination; FLOW-INJECTION ANALYSIS; QUANTUM-DOTS; ELECTROGENERATED CHEMILUMINESCENCE; HYDROGEN-PEROXIDE; NANOCRYSTALS; SYSTEM; CDSE; LUMINESCENT;

D O I：

10.1002/bio.1376

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A highly sensitive flow-injection chemiluminescence (FIA-CL) method based on the CdTe nanocrystals and potassium permanganate chemiluminescence system was developed for the determination of L-ascorbic acid. It was found that sodium hexametaphosphate (SP), as an enhancer, could increase the chemiluminescence (CL) emission from the redox reaction of CdTe quantum dots with potassium permanganate in near-neutral pH conditions. L-Ascorbic acid is suggested as a sensitive enhancer for use in the above energy-transfer excitation process. Under optimal conditions, the calibration graph of emission intensity against logarithmic L-ascorbic acid concentration was linear in the range 1.0 x 10(-9) -5.0 x 10(-6) mol/L, with a correlation coefficient of 0.9969 and relative standard deviation (RSD) of 2.3% (n=7) at 5.0 x 10(-7) mol/L. The method was successfully used to determine L-ascorbic acid in vitamin C tablets. The possible mechanism of the chemiluminescence in the system is also discussed. Copyright (C) 2012 John Wiley & Sons, Ltd.

引用

页码：466 / 472

页数：7

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