title: Synthesis of divinylbenzene polymer/Fe₃O₄ hybrid monolithic column for enrichment and online thermal desorption of methylmercury in real samples.
abstract: A novel method of divinylbenzene polymer (DVB)/Fe3O4 hybrid monolithic column solid phase extraction and on line thermal desorption was developed to analyze methylmercury (MeHg) in water and fish samples. The monolithic column was prepared by in situ polymerization in silica tube and its heating characteristic was studied in detail. Special accent was put on the study of parameters influencing adsorption and desorption of MeHg, such as pH, flow rate of sample solution, temperature of desorption and flow rate of carrier. Under optimum conditions, the detection limit and relative standard deviation of MeHg were 0.09 ng L(-1) and 2.6% (10 ng L(-1), N=11), respectively. Recoveries of MeHg were never less than 96%. Standard reference material GBW10029 was analyzed for validation of the methodology. This method was successfully applied to the determination of MeHg in water and fish samples.
authors: Department of chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
authors: Renren
authors: R
authors: Ma
authors: Department of chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
authors: Fangfang
authors: F
authors: Cao
authors: Key Laboratory of Cigarette Smoke Research of China National Tobacco Corporation, Shanghai 200082, PR China.
authors: Baizhan
authors: B
authors: Liu
authors: Department of chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.
authors: Huan
authors: H
authors: Hu
authors: Department of chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China. Electronic address: wgan@ustc.edu.cn.
authors: Wuer
authors: W
authors: Gan
mesh_terms: D000818:Animals; D005290:Ferric Compounds / Q000737:chemistry*; D005399:Fishes / Q000378:metabolism*; D057230:Limit of Detection; D008767:Methylmercury Compounds / Q000032:analysis* / Q000302:isolation & purification; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000379:methods*; D013054:Spectrophotometry, Atomic; D014753:Vinyl Compounds / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D005290:Ferric Compounds; D008767:Methylmercury Compounds; D011108:Polymers; D014753:Vinyl Compounds; D014874:Water Pollutants, Chemical; C000499:ferric oxide; C004985:divinyl benzene; C004925:methylmercuric chloride
keywords: AFS; Electromagnetic induction heating; Methylmercury; Monolith