کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
581589 1453159 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mercury(II) and methyl mercury speciation on Streptococcus pyogenes loaded Dowex Optipore SD-2
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Mercury(II) and methyl mercury speciation on Streptococcus pyogenes loaded Dowex Optipore SD-2
چکیده انگلیسی
A solid phase extraction procedure based on speciation of mercury(II) and methyl mercury on Streptococcus pyogenes immobilized on Dowex Optipore SD-2 has been established. Selective and sequential elution with 0.1 mol L−1 HCl for methyl mercury and 2 mol L−1 HCl for mercury(II) were performed at pH 8. The determination of mercury levels was performed by cold vapour atomic absorption spectrometry (CVAAS). Optimal analytical conditions including pH, amounts of biosorbent, sample volumes, etc., were investigated. The influences of the some alkaline and earth alkaline ions and some transition metals on the recoveries were also investigated. The capacity of biosorbent for mercury(II) and methyl mercury was 4.8 and 3.4 mg g−1. The detection limit (3 sigma) of the reagent blank for mercury(II) and methyl mercury was 2.1 and 1.5 ng L−1. Preconcentration factor was calculated as 25. The relative standard deviations of the procedure were below 7%. The validation of the presented procedure is performed by the analysis of standard reference material (NRCC-DORM 2 Dogfish Muscle). The procedure was successfully applied to the speciation of mercury(II) and methyl mercury in natural water and environmental samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 169, Issues 1–3, 30 September 2009, Pages 345-350
نویسندگان
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