title: One pot synthesis of magnetic graphene/carbon nanotube composites as magnetic dispersive solid-phase extraction adsorbent for rapid determination of oxytetracycline in sewage water.
abstract: A simple and time-saving one pot synthesis of magnetic graphene/carbon nanotube composites (M-G/CNTs) was developed that could avoid the tedious drying process of graphite oxide, and G/CNTs were modified by Fe3O4 nanoparticles in the reduction procedure. It contributed to a shorten duration of the synthesis process of M-G/CNTs. The obtained M-G/CNTs were characterized and the results indicated that CNTs and Fe3O4 nanoparticles were served as spacer distributing to the layers of graphene, which was beneficial for enlarging surface area and improving extraction efficiency. Moreover, M-G/CNTs showed good magnetic property and outstanding thermal stability. Then M-G/CNTs were applied as adsorbent of magnetic dispersive solid-phase extraction for rapid extraction and determination of oxytetracycline in sewage water. Under the optimum conditions, good linearity was obtained in the range of 20-800ngmL(-1) and the recoveries were ranged from 95.5% to 112.5% with relative standard deviations less than 5.8%.
authors.affiliation: Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Department of Preventive Medicine and Health Management, College of Pharmacy, Hebei University, Baoding 071002, China.
authors.forename: Yunyun
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Department of Preventive Medicine and Health Management, College of Pharmacy, Hebei University, Baoding 071002, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Tian
authors.affiliation: Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Department of Preventive Medicine and Health Management, College of Pharmacy, Hebei University, Baoding 071002, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Wang
authors.affiliation: Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Department of Preventive Medicine and Health Management, College of Pharmacy, Hebei University, Baoding 071002, China. Electronic address: yanhy@hbu.edu.cn.
authors.forename: Hongyuan
authors.initials: H
authors.lastname: Yan
authors.affiliation: Department of Biochemistry, Baoding University, Baoding 071002, China.
authors.forename: Fengxia
authors.initials: F
authors.lastname: Qiao
authors.affiliation: Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Department of Preventive Medicine and Health Management, College of Pharmacy, Hebei University, Baoding 071002, China.
authors.forename: Xiaoqiang
authors.initials: X
authors.lastname: Qiao
mesh_terms: D000327:Adsorption; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D006108:Graphite / Q000737:chemistry*; D008280:Magnetics; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010118:Oxytetracycline / Q000032:analysis*; D012722:Sewage / Q000737:chemistry*; D052616:Solid Phase Extraction; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D037742:Nanotubes, Carbon; D012722:Sewage; D014874:Water Pollutants, Chemical; D014867:Water; D006108:Graphite; D010118:Oxytetracycline
keywords: Carbon nanotube; Graphene; Magnetic dispersive solid-phase extraction; Oxytetracycline; Sewage water