title: Enrichment of polycyclic aromatic hydrocarbons in seawater with magnesium oxide microspheres as a solid-phase extraction sorbent.
abstract: The enrichment of polycyclic aromatic hydrocarbons (PAHs) in water samples with magnesium oxide (MgO) microspheres was evaluated, and four 3-5-ring PAHs were used as probes to validate the adsorption capacity of the material. Factors affecting the recovery of PAHs were investigated in detail, including the type and concentration of organic modifiers, elution solvents, particle size of the adsorbent, volume and flow rate of the samples, and the lifetime of MgO cartridges. The recoveries of four PAHs extracted from 20 mL of seawater spiked with standard PAHs ranged from 85.8% to 102.0% under the optimised conditions. The limits of detection varied from 1.83 ng L(-1) to 16.03 ng L(-1), indicating that the analytical method was highly sensitive. Additionally, the proposed method was successfully used to enrich PAHs in seawater. Compared to conventional methods, the proposed method consumed less organic modifier (5% acetone), and cheaper sorbents with comparable extraction efficiency were employed.
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences, No. 457 Zhongshan Road, Dalian 116023, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Jin
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Zhang
authors.forename: Yun
authors.initials: Y
authors.lastname: Li
authors.forename: Peipei
authors.initials: P
authors.lastname: Qi
authors.forename: Xianbo
authors.initials: X
authors.lastname: Lu
authors.forename: Jincheng
authors.initials: J
authors.lastname: Wang
authors.forename: Jiping
authors.initials: J
authors.lastname: Chen
authors.forename: Fan
authors.initials: F
authors.lastname: Su
mesh_terms: D000327:Adsorption; D057230:Limit of Detection; D008277:Magnesium Oxide / Q000737:chemistry*; D008863:Microspheres; D010316:Particle Size; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D012623:Seawater / Q000032:analysis* / Q000737:chemistry; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*; D012997:Solvents / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D012997:Solvents; D014867:Water; D008277:Magnesium Oxide