Application of an exfoliated graphite nanoplatelet-modified electrode for the determination of quintozen

作者：Ion Ion; Ion Alina Catrinel^*; Culetu Alina

来源：Materials Science and Engineering: C , 2011, 31(7): 1553-1557.

DOI：10.1016/j.msec.2011.07.004

• Carbon based nanomaterials
• Pesticides
• Agriculture
• Nanostructuring electrode

A chitosan-grafted exfoliated graphite nanoplatelet (xGnP) hybrid chemically modified electrode was developed and characterized for the determination of organochlorine pesticides with nitro groups using quintozen as a representative. The hybrid material was characterized by Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-VIS) and scanning electron microscopy (SEM). The electrochemical properties of the chitosan-xGnP modified electrode were characterized by a physical deposition method for depositing it on a graphite electrode. Because of the affinity of the xGnP for nitro groups, nitroaromatic organophosphate pesticides are attached to the surface, allowing the extraction of quintozen within a short time (4 min). The differential pulse response was linear over the quintozen concentration range of 10(-12)-10(-6) M, and the current linearly increased with the quintozen concentrations in two concentration ranges: from 10(-12) to 10(-8) M with the linear regression equation of y = 0.0423x + 0.6451, R(2)=0.9964 and from 10(-8) to 10(-6) M with the linear regression equation of y = 0.0085x + 0.303, R(2)=0.9952, with a detection limit of 10(-11) M.

• 出版日期2011-10-10