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Cost‐efficient magnetic nanoporous carbon derived from citrus peel for the selective adsorption of seven insecticides
Author(s) -
Zhou Yuantao,
Cao Shurui,
Xi Cunxian,
Chen Jiuyan,
Zhang Lei,
Li Xianliang,
Wang Guomin,
Chen Zhiqiong
Publication year - 2018
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201800151
Subject(s) - adsorption , nanoporous , fourier transform infrared spectroscopy , solid phase extraction , detection limit , activated carbon , extraction (chemistry) , superparamagnetism , mass spectrometry , nuclear chemistry , materials science , chemistry , x ray photoelectron spectroscopy , chromatography , analytical chemistry (journal) , chemical engineering , nanotechnology , organic chemistry , magnetization , physics , quantum mechanics , magnetic field , engineering
A magnetic solid‐phase extraction adsorbent that consisted of citrus peel‐derived nanoporous carbon and silica‐coated Fe 3 O 4 microspheres (C/SiO 2 @Fe 3 O 4 ) was successfully fabricated by co‐precipitation. As a modifier for magnetic microspheres, citrus peel‐derived nanoporous carbon was not only economical and renewable for its raw material, but exerted enormous nanosized pore structure, which could directly influence the type of adsorbed analytes. The C/SiO 2 @Fe 3 O 4 also possessed the advantages of Fe 3 O 4 microspheres like superparamagnetism, which could be easily separated magnetically after adsorption. Integrating the superior of biomass‐derived nanoporous carbon and Fe 3 O 4 microspheres, the as‐prepared C/SiO 2 @Fe 3 O 4 showed high extraction efficiency for target analytes. The obtained material was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X‐ray photoelectron spectroscopy, and the Brunauer–Emmett–Teller method, which demonstrated that C/SiO 2 @Fe 3 O 4 was successfully synthesized. Under the optimal conditions, the adsorbent was selected for the selective adsorption of seven insecticides before gas chromatography with mass spectrometry detection, and good linearity was obtained in the concentration range of 2–200 μg/kg with the correlation coefficient ranging from 0.9952 to 0.9997. The limits of detection were in the range of 0.03–0.39 μg/kg. The proposed method has been successfully applied to the enrichment and detection of seven insecticides in real vegetable samples.