294
A. Gnamus and M. Horvat
3.4.1
Soil Samples
For verifying the accuracy of total and monomethylmercury measurements in
soil samples, an IAEA reference material IAEA-3S6, trace elements and
monomethylmercury in polluted marine sediment, was used. This is at present
the most suitable reference material of composition similar to soil that is also
certified for monomethylmercury (Horvat et al. 1994).
3.4.2
Plant and Animal Samples
Analytical quality control of the results for total and monomethylmercury in
plant and animal samples was performed by analysis of CRMs obtained from the
National Research Council of Canada (NRCC): DORM-I, dogfish muscle; DOLT1, dogfish liver; and TORT-I, lobster hepatopancreas. The same CRMs were used
to verify the accuracies of total and monomethylmercury determinations in plant
and animal samples. Although these CRMs are marine animal matrices, they are
at present the only available reference materials of biotic origin with certified
values for monomethylmercury that are comparable to the values found in the
samples from the area heavily polluted by mercury.
4
Results and Discussion
4.1
Soil Samples and Composite Plant Samples Corresponding
to Roe Deer Diet in the Idrija Area
The area surrounding Idrija is mostly covered with temperate continental
deciduous climax forestal vegetation - the main tree species is beech forming
various communities (lowland submontane Hacquetio-Fagetum, thermophilic
Ostryo-Fagetum and the mesophilic Omphalodo-Fagetum or Abieti-Fagetum
Dinaricum), while at higher altitudes the area is covered with montane beech
forest (Lamio orvale-Fagetum). The soils of the surveyed area developed
mainly on carbonate rocks and are rather shallow. In the higher parts and
slopes rendzina is the predominate soil type, but it is supplemented with
deposits of brown carbonate soils on limestone and dolomite, and eutric
cambisols on different carbonate and noncarbonate rocks (conglomerate,
brecchia and schists). To a smaller extent, dystric cambisols and dystric ranker
on the Permo-Carboniferous schists and grits appear in locations east of Idrija,
where the vegetation also changes to acidic fir forest (Galio rotundifoliiAbietetum).
A. Gnamus and M. Horvat
3.4.1
Soil Samples
For verifying the accuracy of total and monomethylmercury measurements in
soil samples, an IAEA reference material IAEA-3S6, trace elements and
monomethylmercury in polluted marine sediment, was used. This is at present
the most suitable reference material of composition similar to soil that is also
certified for monomethylmercury (Horvat et al. 1994).
3.4.2
Plant and Animal Samples
Analytical quality control of the results for total and monomethylmercury in
plant and animal samples was performed by analysis of CRMs obtained from the
National Research Council of Canada (NRCC): DORM-I, dogfish muscle; DOLT1, dogfish liver; and TORT-I, lobster hepatopancreas. The same CRMs were used
to verify the accuracies of total and monomethylmercury determinations in plant
and animal samples. Although these CRMs are marine animal matrices, they are
at present the only available reference materials of biotic origin with certified
values for monomethylmercury that are comparable to the values found in the
samples from the area heavily polluted by mercury.
4
Results and Discussion
4.1
Soil Samples and Composite Plant Samples Corresponding
to Roe Deer Diet in the Idrija Area
The area surrounding Idrija is mostly covered with temperate continental
deciduous climax forestal vegetation - the main tree species is beech forming
various communities (lowland submontane Hacquetio-Fagetum, thermophilic
Ostryo-Fagetum and the mesophilic Omphalodo-Fagetum or Abieti-Fagetum
Dinaricum), while at higher altitudes the area is covered with montane beech
forest (Lamio orvale-Fagetum). The soils of the surveyed area developed
mainly on carbonate rocks and are rather shallow. In the higher parts and
slopes rendzina is the predominate soil type, but it is supplemented with
deposits of brown carbonate soils on limestone and dolomite, and eutric
cambisols on different carbonate and noncarbonate rocks (conglomerate,
brecchia and schists). To a smaller extent, dystric cambisols and dystric ranker
on the Permo-Carboniferous schists and grits appear in locations east of Idrija,
where the vegetation also changes to acidic fir forest (Galio rotundifoliiAbietetum).