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Food Chem. 2015 Aug 15;181:127-32. doi: 10.1016/j.foodchem.2015.02.032. Epub 2015 Feb 14.

Sensitive determination of quinoline yellow using poly (diallyldimethylammonium chloride) functionalized reduced graphene oxide modified grassy carbon electrode.

Author information

1
Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China.
2
Department of Physics and Materials Science and Centre for Functional Photonics (CFP), City University of Hong Kong, 88 Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region.
3
Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong Special Administrative Region.
4
Yunnan University of TCM, Kunming City, Yunnan 650500, PR China. Electronic address: haitaolinyutcm@yahoo.com.

Abstract

A novel poly (diallyldimethylammonium chloride) functionalized reduced graphene oxide (PDDA-RGO) nanocomposite modified electrode was fabricated, and applied for the electrochemical determination of quinoline yellow (QY). The formation of PDDA-RGO nanocomposite was confirmed by SEM, FTIR and Raman spectroscopy. The electrocatalytic activity of PDDA-RGO nanocomposite to the oxidation of QY was evaluated using cyclic voltammetry and differential pulse voltammetry. Under the optimal conditions, the proposed sensor exhibited excellent electrochemical performance towards detection of QY. The linear range is from 0.01 to 10 μM, and the detection limit is down to 0.002 μM (S/N=3). The proposed sensor also exhibited excellent anti-interference property, repeatability and stability. In addition, the proposed electrochemical sensor was successfully applied to determination of QY in soft drink.

KEYWORDS:

Electrochemical sensor; Food analysis; Glassy carbon electrode; Graphene; PDDA; Quinoline yellow

PMID:
25794730
DOI:
10.1016/j.foodchem.2015.02.032
[Indexed for MEDLINE]

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