Journal
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Volume 172, Issue -, Pages 167-175Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2019.01.091
Keywords
Platinum nanochains; Graphene nanoparticles; Multi-walled carbon nanotubes; Dopamine; Ascorbic acid; Differential pulse voltammetry
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Funding
- National Natural Science Foundation of China [51674292, 51574118]
- Provincial Natural Science Foundation of Hunan [2016JJ1023]
- Hunan Provincial Science and Technology Plan Project, China [2018TP1003]
- Fundamental Research Funds for the Central Universities of Central South University [2018zzts361]
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In this study, platinum nanochains (PtNCs), multi-walled carbon nanotubes (MWCNTs) and graphene nano particles (GNPs) were assembled together to form a novel nanocomposite by a facile ultrasonic-assisted blending process. The PtNCs-MWCNTs-GNPs nanocomposite was characterized by high resolution transmission electron microscopy (HR-TEM), energy dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The nanocomposite was used for the modification of glass carbon electrode (GCE) and simultaneous determination of dopamine (DA) and ascorbic acid (AA) by differential pulse voltammetry (DPV) and cycle voltammetry (CV). Under the optimum conditions, the calibration curves obtained are linear for the currents versus DA and AA concentrations over the range 2.00-50.0 mu M and 100-1200 mu M, respectively. And the detection limits for DA and AA are 0.500 mu M and 10.0 mu M, respectively. The detection and quantitative analysis of DA and AA in human serum and vitamin C tablets on PtNCs-MWCNTs-GNPs/GCE gave the recoveries of 104-110% and 101-108% with relative standard deviations (RSD) of 4.36-7.48% and 0.620-2.90%, respectively. The proposed PtNCs-MWCNTs-GNPs composite could provide a new platform for the routine analysis of DA and AA in terms of its good anti-interference ability, excellent reproducibility and repeatability, and feasibility of use.
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