Determination of nitrite based on its quenching effect on anodic electrochemiluminescence of CdSe quantum dots

被引：57

作者：

Liu, Xuan ^{[1
]}

Guo, Liang ^{[1
]}

Cheng, Lingxiao ^{[1
]}

Ju, Huangxian ^{[1
]}

机构：

[1] Nanjing Univ, Dept Chem, Key Lab Analyt Chem Life Sci, Minist Educ China, Nanjing 210093, Peoples R China

来源：

TALANTA | 2009年 / 78卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Quantum dots; Electrochemiluminescence; CdSe; Sensitizing effect; Quenching; Nitrite; ELECTROGENERATED CHEMILUMINESCENCE; FILM; NANOCRYSTALS; BIOSENSOR; SENSORS; NITRATE; SURFACE;

D O I：

10.1016/j.talanta.2008.12.035

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel method for electrochemiluminescent(ECL) detection of nitrite was proposed based on its quenching effect on anodic ECLemission of CdSe quantum dots (QDs). The ECL emission could be greatly enhanced by sulfite and dissolved oxygen in a neutral system and occurred at a relatively low potential in comparison with traditional anodic ECL emitter, leading to high sensitivity and good selectivity. The quenching mechanism followed an "electrochemical oxidation inhibition" process, which was completely different from those of some analytes on the ECL emission of QDs. The coincidence of photoluminescence and ECL spectra of the QDs indicated that the ECL emission resulted from the redox process of QDs core and the sulfite acted as a coreactant. The nitrite quenched ECL emission could be analyzed according to the treatment of Stern-Volmer equation with a linear range from 1 mu M to 0.5 mM for detection of nitrite. This work presented a new efficient ECL methodology for quencher-related detection. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：691 / 694

页数：4

共 26 条

[1] Semiconductor clusters, nanocrystals, and quantum dots [J].

Alivisatos, AP .

SCIENCE, 1996, 271 (5251) :933-937

[2] Biosensing nitrite using the system nitrite redutase/Nafion/methyl viologen - A voltammetric study [J].

Almeida, M. Gabriela ;

Silveira, Celia M. ;

Moura, Jose J. G. .

BIOSENSORS & BIOELECTRONICS, 2007, 22 (11) :2485-2492

[3] A novel method for the spectrophotometric determination of nitrite in water [J].

Aydin, A ;

Ercan, Ö ;

Tascioglu, S .

TALANTA, 2005, 66 (05) :1181-1186

[4] An electropolymerized Nile Blue sensing film-based nitrite sensor and application in food analysis [J].

Chen, Xiaowei ;

Wang, Fang ;

Chen, Zilin .

ANALYTICA CHIMICA ACTA, 2008, 623 (02) :213-220

[5] A novel nitrite biosensor based on the direct electron transfer of hemoglobin immobilized on CdS hollow nanospheres [J].

Dai, Zhihui ;

Bai, Hongyan ;

Hong, Mei ;

Zhu, Yinyan ;

Bao, Jianchun ;

Shen, Jian .

BIOSENSORS & BIOELECTRONICS, 2008, 23 (12) :1869-1873

[6] Enhanced solid-state electrochemiluminescence of CdS nanocrystals composited with carbon nanotubes in H2O2 solution [J].

Ding, Shou-Nian ;

Xu, Jing-Juan ;

Chen, Hong-Yuan .

CHEMICAL COMMUNICATIONS, 2006, (34) :3631-3633

[7] Electrochemistry and electrogenerated chemiluminescence from silicon nanocrystal quantum dots [J].

Ding, ZF ;

Quinn, BM ;

Haram, SK ;

Pell, LE ;

Korgel, BA ;

Bard, AJ .

SCIENCE, 2002, 296 (5571) :1293-1297

[8] Quantification of residual nitrite and nitrate in ham by reverse-phase high performance liquid chromatography/diode array detector [J].

Ferreira, I. M. P. L. V. O. ;

Silva, S. .

TALANTA, 2008, 74 (05) :1598-1602

[9] Electrochemiluminescence sensors for scavengers of hydroxyl radical based on its annihilation in CdSe quantum dots film/peroxide system [J].

Jiang, Hui ;

Ju, Huangxian .

ANALYTICAL CHEMISTRY, 2007, 79 (17) :6690-6696

[10] Enzyme-quantum dots architecture for highly sensitive electrochemiluminescence biosensing of oxidase substrates [J].

Jiang, Hui ;

Ju, Huangxian .

CHEMICAL COMMUNICATIONS, 2007, (04) :404-406

← 1 2 3 →