Naslov
Spectrofluorimetric method for determination of the total mercury content in natural waters

Autori
Balint, Lazar ; Vedrina-Dragojević, Irena ; Horvatić, Marija ; Murati, Ivo

Izvornik
Zeitschrift für Lebensmittel-Untersuchung und - Forschung (0044-3026) 198 (1994), 1; 29-32

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
total mercury ; natural waters ; spectrofluorometric method

Sažetak
A simple and highly selective spectrofluorometric method for the determination of the total mercury (Hg) in natural waters is described. Fluorescence quenching of rhodamine B with Hg(II) in presence of iodide, after a concentration step, has been made the basis of this sensitive method. Organic and inorganic Hg compounds in water sampes were decomposed with sulphuric acid and potassium permanganate. Precipitated manganese dioxide and excess oxidants (permanganate) were destroyed with hydroxylammonium chloride. Hg (II) was reduced by tin (II) chloride and Hg vapour driven by an air stream into am absorption solution containing potassium permanganate and sulphuric acid, using a closed, recirculating air stream. In this solution fluorescence quenching of rhodamine B at an excitation wavelenght of 485 nm and emission wavelenght of 586 nm was measured. This method is suitable for the determination of total Hg in drinking and surface waters. The method gives reliable results down to a concentration of 0.5 ug Hg per litre of water. The water samples analysed by this method gave a mean recovery and standard error of 97.3 +- 2.39 for added Hg.

Izvorni jezik
Engleski

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