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Simple methodology for methylmercury and inorganic mercury determination by high performance liquid chromatography-cold vapour atomic fluorescence spectrometry IPB - Escola Superior Agrária
Ramalhosa, Elsa; Río-Segade, Susana; Pereira, Eduarda; Vale, Carlos; Armando, Duarte.
An analytical methodology was developed to separate and quantify methylmercury (MeHg) and inorganic mercury by high-performance liquid chromatography (HPLC)-cold vapour atomic fluorescence spectrometry (CV-AFS). The use of UV oxidation of the organic forms of mercury, the tin(II) chloride reduction in acidic medium of mercury and the introduction of a water vapour trap based on H2SO4/CaCl2 resulted in a low detection limit (DL) (10 +/- 2 pg, mean value +/- S.D.). The apparatus was operationally optimised through the modified simplex method leading to an increase of the signal by a factor of 2. The method performance has been tested by determining the MeHg concentration in a sediment certified reference material (CRM) and the results were statistically...
Tipo: Article Palavras-chave: Methylmercury; Cold vapour atomic fluorescence spectromety; Liquid chromatography; UV radiation; Simplex optimisation.
Ano: 2001 URL: http://hdl.handle.net/10198/3946
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