Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 243, Issue -, Pages 232-241Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2012.10.026
Keywords
Electro-polymerised graphene-nafion film/GCE; Substituted benzene-azo-quinoline; Voltammetry; Nitroanilines; Water samples; Partial least squares
Categories
Funding
- National Natural Science Foundation of China [NSFC-21065007]
- State Key Laboratory of Food Science and Technology of Nanchang University [SKLF-MB-201002, SKLF-TS-200919]
Ask authors/readers for more resources
A new modified electrode was constructed by the electro-polymerization of 7[(2,4-dihydroxy-5-carboxybenzene)azo]-8-hydroxyquinoline-5-sulfonic acid (DHCBAQS) at a graphene-nafion modified glassy carbon electrode (GCE). The construction process was performed stepwise and at each step the electrochemical characteristics were investigated particularly with respect to the oxidation of the three noxious analytes, 2-nitroaniline (2-NA), 3-nitroaniline (3-NA), 4-nitroaniline (4-NA); the electrode treated with the fluorescence reagent DHCBAQS performed best. At this electrode, the differential pulse voltammetry peak currents of the three isomers increased linearly with their concentrations in the range of 0.05-0.60 mu g mL(-1), respectively, and their corresponding limits of detection (LODs) were all about 0.022 mu g mL(-1). Furthermore, satisfactory results were obtained when this electrode was applied for the simultaneous quantitative analysis of the nitroaniline isomer mixtures by Principal component regression (PCR) and Partial least squares (PLS) as calibration methods (relative prediction error (PRET) - 9.04% and 9.23%) and average recoveries (101.0% and 101.7%), respectively. The above novel poly-DHCBAQS/graphene-nafion/GCE was successfully employed for the simultaneous analysis of the three noxious nitroaniline isomers in water and sewage samples. (C) 2012 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available