Selective determination method for measurement of methylmercury and ethylmercury in soil/sediment samples using high-performance liquid chromatography–chemiluminescence detection coupled with simple extraction technique
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A method for the simultaneous determination of monomethylmercury (MeHg+) and monoethylmercury (EtHg+) in soil/sediment samples was developed. The method involves eluting mercury species from the soil/sediment samples using 5 M HCl containing 5 mM Pd2+ and 0.1 M Cu2+ and then extracting MeHg+ and EtHg+ into toluene as chlorides. These alkylmercury chlorides are then back-extracted into an aqueous EDTA solution, creating EDTA complexes. Finally, an emetine-dithiocarbamate (emetineCS2) solution is added to the EDTA solution to form emetineCS2–alkylmercury complexes. EmetineCS2–MeHg and emetineCS2–EtHg were separated using reverse-phase HPLC and then detected by the chemiluminescence reaction with tris(2,2′-bipyridine)ruthenium(III). The MeHg+ and EtHg+ calibration curves, using the peak height, were linear from 0.5 to 20 ng (as Hg). The detection limit was 0.16 ng/g (analyzing 1 g soil or sediment). The procedure was validated by analyzing a certified reference material (ERM CC580, estuarine sediment). The MeHg+ concentration determined using the proposed method was in good agreement with the certified value, and EtHg+ was detected in the reference material. A preliminary study of the relationship between environmental mercury concentrations and MeHg+ production was performed.
収録刊行物
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- Journal of Chromatography A
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Journal of Chromatography A 1288 155-159, 2013
Elsevier
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詳細情報 詳細情報について
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- CRID
- 1050001202611285120
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- NII論文ID
- 120005303692
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- NII書誌ID
- AA10985833
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- HANDLE
- 10232/18558
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- ISSN
- 00219673
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- Crossref
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