Journal
MICROCHIMICA ACTA
Volume 181, Issue 9-10, Pages 1077-1084Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-014-1206-9
Keywords
Graphene; Chitosan; Acetylene black; 2-nitrophenol; 4-nitrophenol; Simultaneous determination
Categories
Funding
- National Natural Science Foundation of China [21105024]
- Science and Technology Department of Hunan Province [2013FJ3078]
- Education Department of Hunan Province [11CY002]
- Open Fund of Key Laboratory of Functional Organometallic Materials of Ordinary University in Hunan Province [12 K125]
- Key Discipline Project of Hunan Province
- Research Award Fund for Outstanding Young Teachers of Hunan Province
Ask authors/readers for more resources
We describe a simple and sensitive voltammetric method for the simultaneous determination of 2-nitrophenol and 4-nitrophenol. It is based on the use of an acetylene black paste electrode modified with a graphene-chitosan composite film (denoted as Gr-Chit/ABPE). The reduction peak currents of 2-nitrophenol (at -252 mV) and of 4-nitrophenol (at -340 mV) in pH 1.0 solution increase significantly at the Gr-Chit/ABPE in comparison to a bare ABPE. Factors affecting sensitivity were optimized and a linear relationship is found between peak current and the concentrations of 2-nitrophenol (in the 0.4 mu M to 80 mu M range) and for 4-nitrophenol (in the 0.1 mu M to 80 mu M range). The detection limits (at an SNR of 3 and after a 30-s accumulation time) are 200 nM for 2-nitrophenol and 80 nM for 4-nitrophenol, respectively. The modified electrode was successfully applied to the direct and parallel determination of 2-nitrophenol and 4-nitrophenol in spiked water samples.
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