title: Octadecylimidazolium ionic liquid-modified magnetic materials: Preparation, adsorption evaluation and their excellent application for honey and cinnamon.
abstract: A novel and versatile adsorbent based on 1-octadecylimidazolium ionic liquid modified magnetic nanoparticles (Fe3O4@SiO2@ImC18) possessing of both magnetic property and excellent adsorption ability was successfully synthesized. Twelve compounds from four kinds of substances (alkylbenzenes, PAHs, flavonoids and organic acids) were chosen as probe molecules to evaluate adsorption properties of the new adsorbent. A series of adsorption experiments were conducted and results indicated both synergism and competition effects were existed and multiple interactions took place during adsorption process. After considerable acquaintances with the adsorbent, it was successfully applied for real samples analysis of honey and cinnamon. Three flavonoid compounds of myricetin, quercetin and luteolin from honey and cinnamic acid from cinnamon were all detected and quantified. Meanwhile, it reached 280-fold concentration reduction of interferent during the extraction of cinnamic acid from cinnamon. The recoveries were in the range of 85.4-94.8% with relative standard deviations (n=3) of 2.5-5.6%.The current study not only provided a strategy to evaluate new adsorbent, but also demonstrated the novel Fe3O4@SiO2@ImC18 material was reliable, accurate and suitable for sample pretreatment in pharmaceutical and food chemistry.
authors.affiliation: Key Laboratory of Chemistry of Northwestern Plant Resources & Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Houmei
authors.initials: H
authors.lastname: Liu
authors.affiliation: Key Laboratory of Chemistry of Northwestern Plant Resources & Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China. Electronic address: lizhancg@licp.cas.cn.
authors.forename: Zhan
authors.initials: Z
authors.lastname: Li
authors.affiliation: Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Takafuji
authors.affiliation: Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan.
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Ihara
authors.affiliation: Key Laboratory of Chemistry of Northwestern Plant Resources & Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China. Electronic address: hdqiu@licp.cas.cn.
authors.forename: Hongdeng
authors.initials: H
authors.lastname: Qiu
mesh_terms: D000327:Adsorption; D002935:Cinnamomum zeylanicum / Q000737:chemistry*; D006722:Honey / Q000032:analysis*; D052578:Ionic Liquids / Q000737:chemistry*; D008280:Magnetics; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*
chemical_list: D052578:Ionic Liquids; D011084:Polycyclic Aromatic Hydrocarbons
keywords: Adsorbent evaluation method; Cinnamon; Honey; Ionic liquids; Langmuir adsorption model; Magnetic adsorbent