Nominal Value
Ag
Cd
Co
Cr
Cu
Hg
Mn
Ni
Pb
Zn
9.32
9.65
21.9
450
244
4.4
704
79
170
950
± 1.6
±1.2
±2
± 27
± 14
± 0.33
± 51
± 6.6
± 9.7
± 4.2
1
g Sediment, 15
ml HN0
3 /3
ml HCl0
4 , 3
h
open digestion with reflux condenser, n
= 5
x [Ilg g-l]
10.2
22.3
451
264
4.7
773
61.2
157
976
2
s~
[Ilg g-l]
0.32
2.8
20.2
15.9
0.16
8.8
3.6
6.7
32.8
V
[%]
3.1
12.6
4.5
6.0
3.4
1.1
5.9
4.3
3.4
0.3
g Sediment, 4
h digestion
in oxygen plasma", n
= 3
x [Ilg g-l]
7.0
9.2
14.3
495
237
2.9
657
45.1
152
853
2
s; [llgg- 1
]
0.2
0.26
0.24
6.6
3.3
0.24
22.4
0.18
2.3
14.5
V
[%]
2.9
2.8
1.7
1.3
1.4
8.3
3.4
0.4
1.5
1.7
0.4
g Sediment, 3
ml HN0
3 /1
ml HCl
3
h pressurized digestion, n
= 17
x [Ilg g-l]
8.5
9.8
21.6
471
262
4.6
762
75.7
173
972
2
s~
[Ilg g-l]
0.36
0.16
1.1
9.7
4.7
0.12
12
2.6
3.7
12.9
V
[%]
4.2
1.6
5.1
2.1
1.8
2.6
1.6
3.4
2.1
1.3
" The digestions were carried out in quartz dishes in an oxygen plasma produced by microwave (International Plasma Corporation 4000).
The pressure was 0.1 -
5
mbar, the oxygen flow 300
ml min-I, the electrical power 100-150
W. The residue was shaken with 1
ml of tridistilled water and 1
ml HC!.
b ± 2
standard deviation.
s::
~
U>
'"