Methylmercury determination as volatile methylmercury hydride by purge and trap gas chromatography in line with Fourier transform infrared spectroscopy

Article Abstract:

Monomethylmercury is more volatile than inorganic mercuric ions. Methylmercury chloride was combined with aqueous solutions of NaBH4, and the formation of the volatile mercury derivative was studied. This derivatization method was used in conjunction with a Fourier transform infrared spectrometer and a gas chromatograph in the speciation of methylmercury. Hydrogen from NaBH4 reacted with methylmercury chloride in aqueous solution to produce MeHgH, while deuterium from NaBD4 reacted to produce MeHgD.

Usage, Gas chromatography, Fourier transform infrared spectroscopy

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Bioaccumulation of methylmercury and transformation of inorganic

Article Abstract:

The concentrations of mercury and methylmercury in several fungi species were measured by means of a variable volume extraction procedure. Experiments were carried out wherein methylmercury was extracted from fungi carpophores C. comatus and C. radians and the humus material beneath them. The total mercury content for the carpophores was also determined. Results the fungi bioaccumulate methylmercury and transform inorganic mercury to methylmercury.

Environmental aspects, Fungi, Mercury (Metal)

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Kinetics, doses-response, and excretion of methylmercury in free-living adult Cory's shearwaters

Article Abstract:

The methymercury (MHg) kinetics, dose-responses, and excretion in wild Cory's shearwaters were evaluated. The results indicate that important differences exist between models derived from mammals and the role of seasonal feather molt. The experiment and results are discussed, tabulated and graphed.

Health aspects, Economic aspects, Ornithological research, Mercury poisoning

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