title: Magnetic spherical carbon as an efficient adsorbent for the magnetic extraction of phthalate esters from lake water and milk samples.
abstract: Magnetic spherical carbon was synthesized by a facile hydrothermal carbonization procedure with biomass glucose as the carbon precursor and nanoclusters iron colloid as magnetic precursor. The textures of the as-prepared magnetic spherical carbon were characterized by nitrogen adsorption-desorption isotherms, X-ray diffraction, transmission electron microscopy, scanning electron microscopy and vibration sample magnetometry. Results indicated that the magnetic spherical carbon possessed high surface area as well as strong magnetism, which endows the material with good adsorption capability and easy separation properties. To assess its absorption performance, the magnetic spherical carbon was employed as adsorbent for the extraction and preconcentration of phthalate esters from lake water and milk samples before high-performance liquid chromatographic analysis. Some key parameters that could influence the enrichment efficiency were investigated. Under the optimum conditions, a good linearity was achieved with the linear correlation coefficients higher than 0.9973. The limits of detection (S/N = 3) were 0.05-0.08 ng/mL for lake water and 0.1-0.2 ng/mL for milk samples. The recoveries of the analytes for the method were in the range 80.1-112.6%.
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding, China.
authors.forename: Juanjuan
authors.initials: J
authors.lastname: Wu
authors.affiliation: College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, China.
authors.forename: Chenhuan
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding, China.
authors.forename: Xinyu
authors.initials: X
authors.lastname: Liang
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding, China.
authors.forename: Xiumin
authors.initials: X
authors.lastname: Yang
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding, China.
authors.forename: Qiuhua
authors.initials: Q
authors.lastname: Wu
authors.affiliation: Department of Chemistry, College of Science, Agricultural University of Hebei, Baoding, China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D000818:Animals; D002244:Carbon; D002851:Chromatography, High Pressure Liquid; D004952:Esters / Q000302:isolation & purification*; D060106:Lakes / Q000737:chemistry*; D008892:Milk / Q000737:chemistry*; D010795:Phthalic Acids / Q000302:isolation & purification*
chemical_list: D004952:Esters; D010795:Phthalic Acids; C032279:phthalic acid; D002244:Carbon
keywords: high-performance liquid chromatography; magnetic solid-phase extraction; magnetic spherical carbon; phthalate esters