Table 3 Multielement composition of seaweed and seaweed-derived samples (mean ± SD; mg/kg d.m.)

Al

1150 ± 1

461 ± 4

1914 ± 3

2694 ± 6

3402 ± 21

1441 ± 35

As

 < LOD

 < LOD

 < LOD

 < LOD

 < LOD

 < LOD

B

111 ± 1

46.7 ± 0.2

200 ± 1

233 ± 1

261 ± 1

100 ± 1

Ba

6.72 ± 0.01

3.22 ± 0.08

10.6 ± 0.1

14.5 ± 0.1

19.6 ± 0.1

9.57 ± 0.23

Ca

9730 ± 47

3212 ± 15

14466 ± 25

19136 ± 44

21125 ± 131

7232 ± 95

Cd

 < LOD

 < LOD

 < LOD

 < LOD

 < LOD

 < LOD

Cr

84.8 ± 0.8

45.3 ± 0.3

94.7 ± 0.2

121 ± 1

161 ± 1

105 ± 2

Cu

 < LOD

 < LOD

 < LOD

0.494 ± 0.005

1.87 ± 0.02

 < LOD

Fe

1926 ± 6

766 ± 9

2926 ± 25

3790 ± 49

4470 ± 92

1681 ± 31

Hg

 < LOD

 < LOD

 < LOD

 < LOD

 < LOD

 < LOD

K

12768 ± 80

4848 ± 5

22863 ± 421

26174 ± 324

30345 ± 543

14505 ± 580

Mg

156457 ± 2082

92667 ± 569

222273 ± 8984

316711 ± 4346

345958 ± 1209

204971 ± 11145

Mn

115 ± 2

42.2 ± 0.5

188 ± 1

241 ± 1

266 ± 1

98.1 ± 1.8

Na

3469 ± 23

2141 ± 73

5459 ± 9

6771 ± 16

7639 ± 47

4639 ± 123

Ni

38.8 ± 0.2

16.6 ± 0.4

43.1 ± 0.2

54.7 ± 1.3

72.5 ± 1.2

42.3 ± 0.2

P

1319 ± 22

465 ± 12

2022 ± 42

5487 ± 29

2686 ± 55

1055 ± 5

Pb

 < LOD

 < LOD

 < LOD

 < LOD

 < LOD

 < LOD

S

27925 ± 45

10832 ± 181

38970 ± 608

46984 ± 720

43360 ± 1232

12351 ± 206

Zn

14.8 ± 0.5

 < LOD

27.3 ± 0.2

34.4 ± 0.1

41.5 ± 0.2

 < LOD