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Determination of Inorganic and Organic Mercury Compounds by Capillary Gas Chromatography Coupled with Atomic Absorption Spectrometry After Preconcentration on Dithizone-anchored Poly(ethylene Glycol Dimethacrylate-hydroxyethylmethacrylate) Microbeads by Bekir Salih; Ridvan Say; Adil Denizli; Ömer Genç; Erhan Pişkin is a Chemistry article available to read on EtoBox.

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Poly(EGDMA-HEMA) microbeads were prepared by suspension polymerization of ethylene glycol dimethacrylate (EGDMA) and hydroxyethyl methacrylate (HEMA). Poly(vinyl alcohol), benzoyl peroxide and toluene were used as stabilizer, initiator, and diluent, respectively. A chelating ligand, dithizone, was then attached. The microbeads were characterized by FTIR spectrometers and elemental analysis. The af®nity microbeads containing 118.9 mmol dithizone g À1 polymer were used for the adsorption/desorption of inorganic mercury [Hg], methyl mercury chloride [CH 3 HgCl] and ethyl mercury chloride [C 2 H 5 HgCl] from aqueous media at concentrations in the range 5±1000 mg l À1 and various pH values (2.0±8.0). Adsorption rates were high, and adsorption equilibria were reached in about 30 min. The maximum adsorption of mercury species onto the dithizone-anchored microbeads from their individual solutions was 138 mg g À1 for Hg(II), 221 mg g À1 for CH 3 HgCl and 207 mg g À1 for C 2 H 5 HgCl. The same behavior was observed during competitive adsorption in the case of the adsorption from their mixture. The af®nity order of mercury species was CH 3 HgCl > C 2 H 5 HgCl > Hg(II). Dithizone-anchored micr

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Author

Bekir Salih; Ridvan Say; Adil Denizli; Ömer Genç; Erhan Pişkin

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0003-2670)

Published

1998

Language

EN

Field

Chemistry (Physical Sciences)