title: Preparation of a Co-doped hierarchically porous carbon from Co/Zn-ZIF: An efficient adsorbent for the extraction of trizine herbicides from environment water and white gourd samples.
abstract: A Co-doped hierarchically porous carbon (Co/HPC) was synthesized through a facile carbonization process by using Co/ZIF-8 as the precursor. The textures of the Co/HPC were investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, vibration sample magnetometry and nitrogen adsorption-desorption isotherms. The results showed that the Co/HPC is in good polyhedral shape with uniform size, sufficient magnetism, high surface area as well as hierarchical pores (micro-, meso- and macropores). To evaluate the extraction performance of the Co/HPC, it was applied as a magnetic adsorbent for the enrichment of triazine herbicides from environment water and white gourd samples prior to high performance liquid chromatographic analysis. The main parameters that affected the extraction efficiency were investigated. Under the optimum conditions, a good linearity for the four triazine herbicides was achieved with the correlation coefficients (r) higher than 0.9970. The limits of detection, based on S/N=3, were 0.02 ng/mL for water and 0.1-0.2 ng/g for white gourd samples, respectively. The recoveries of all the analytes for the method fell in the range from 80.3% to 120.6%.
authors.affiliation: College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Caina
authors.initials: C
authors.lastname: Jiao
authors.affiliation: College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Menghua
authors.initials: M
authors.lastname: Li
authors.affiliation: College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Ruiyang
authors.initials: R
authors.lastname: Ma
authors.affiliation: College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Wang
authors.affiliation: College of Science, Agricultural University of Hebei, Baoding 071001, China.
authors.forename: Qiuhua
authors.initials: Q
authors.lastname: Wu
authors.affiliation: College of Science, Agricultural University of Hebei, Baoding 071001, China. Electronic address: zhiwang2013@aliyun.com.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D005618:Fresh Water / Q000737:chemistry; D006540:Herbicides / Q000302:isolation & purification*; D057230:Limit of Detection; D059346:Magnets; D016062:Porosity; D013499:Surface Properties; D014227:Triazines / Q000302:isolation & purification*; D014675:Vegetables / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D015032:Zinc / Q000737:chemistry*
chemical_list: D006540:Herbicides; D014227:Triazines; D014874:Water Pollutants, Chemical; D002244:Carbon; D015032:Zinc
keywords: Co-doped hierarchically porous carbon; High performance liquid chromatography; Magnetic solid-phase extraction; Triazine herbicides