Table 2.10
Comparison of the extraction of metals from a sediment containing 2.8 %
of organic carbon and 0.17 %
of organic nitrogen using different extration I:;;;
systems (from [34])
All results are in mg kg- 1
:;c
:;;i'
'"
HN0
3 -
HCI0
4
HF - HN0
3 -
HCI0
4
..,
0>
1
N NHzOH·HCl
HN0
3
Aqua regia
(1
+ 1)
(6
+ 4
+ 1)
::s
""
Metal
0.05
N EDTA
+ 25 %
CH
3 COOH
0.5
N HCI
(boiling)
(boiling)
(boiling)
PTFE bomb
;!;'
..,
'"
Al
400
970
4000
15500
25300
38500
43000
0>
i3
Ca
21400
22700
23100
27000
27000
30000
30000
en
'"
Fe
4 800
6 800
12500
32000
32000
34000
42000
§Mg
3800
4800
6900
12000
13 000
12000
16000
'"
Mn
550
620
620
750
800
750
4500
a
'"
Ba
20
80
100
1 100
1600
2600
2700
Cd
2,2
2,2
2,0
4,0
4,0
6,0
40
Co
6
6
8
31
31
36
200
Cr
5,5
15
22
49
48
15
110
Cu
23
16
33
44
40
50
50
Li
0,4
1,0
5,4
33
38
44
50
Ni
16
20
28
32
28
33
200
Ph
53
52
56
70
70
70
100
Zn
97
122
149
218
206
229
290