Naslov
Some problems of selenium analysis in the organic rich recent sediments (pelleoids), Pirovac bay, Croatia.

Autori
Miko, Slobodan ; Šparica, Martina ; Prohić, Esad

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Erdwissenschaftliche Aspekte des Umweltschutzes, Tagungsband / Sauer, Deits - Beč : Österriechisches Forschungs- und Prüfzentrum Arsenal Ges. m. b., 1998, 297-302

Skup
4. Arbaitstagung des Brereiches Umwelt, Erdwissenschaftliche Aspekte des Umweltschutzes, UG’98 Beč, Austrija

Mjesto i datum
Beč, Austrija, 22.04.1998. - 25.04.1998

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Selenium; recent organic matter- carbonate rich sediments; hydride generation; ICP-AES; Pirovac bay; Croatia

Sažetak
Standard digestion techniques utilized at IGI (Institute of Geology) for environmental studies of other trace elements where tested for Se analysis of recent organic matter- carbonate rich sediments. The Se content was determined by hydride generation ICP atomic emission spectrometry after extraction of sediment Se by three different dissolution techniques: 7 mol HNO3 digestion, aqua regia digestion and the acid mixture HF-HCl-HNO3. The concentrations of Se extracted ranged from 0.19 to 0.31 mg kg-1 Se by 7 mol HNO3 digestion, from 0.27 to 0.35 mg kg-1 Se by hot aqua regia digestion and from 0.42 to 0.76 mg kg-1 Se by closed microwave HF-HCl-HNO3 digestion. The large differences in Se concentrations between aqua regia and HF-HCl-HNO3 digestion can be probably attributed to impedance of hydride-forming process that occurs due to the incompletely digested organic material from organic-rich samples by aqua regia.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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