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Table 2 Arsenic concentrations of sequentially extracted fractions of sediments from Site C0002 at Nankai Trough

From: Vertical profiles of arsenic and arsenic species transformations in deep-sea sediment, Nankai Trough, offshore Japan

Sample name

Depth (mbsf)

Total As(ppm)

As concentration (ppm)

Recovery (%)

Step 1

Step 2

Step 3

Step 4

Step 5

Total

C0002D 1H-2

2

3.5

0.18

1.27

0.36

1.67

0.29

3.76

107.3

C0002D 5H-4

38

4.6

0.10

0.15

1.03

3.80

0.76

5.84

127.7

C0002D 7H-4

57

3.3

0.13

0.57

0.42

2.34

0.54

3.99

121.9

C0002D 11H-5

98

3.8

0.12

0.76

0.54

2.31

0.72

4.46

116.2

C0002D 12H-5

106

3.1

0.11

0.49

0.97

1.86

0.67

4.10

132.7

C0002D 13H-5

116

13.5

0.15

1.24

6.12

2.64

0.66

10.81

80.2

C0002D 15X-5

133

6.0

0.08

1.23

0.57

1.88

0.82

4.58

76.7

C0002D 17X-4

160

7.5

0.44

3.69

1.30

2.19

0.31

7.92

105.8

C0002D 18H-1

200

7.4

0.21

2.24

1.14

4.18

0.33

8.11

110.2

C0002D 18H-2

201

7.3

0.06

1.41

0.73

4.73

0.77

7.71

104.9

C0002K 7X-5

242

5.3

0.30

1.19

1.44

2.33

0.49

5.75

107.6

C0002K 9X-3

260

6.6

0.44

0.80

1.86

3.05

0.75

6.91

105.4

C0002L 3X-2

297

3.0

0.25

0.49

0.53

1.04

0.64

2.95

100.0

C0002L 6X-4

327

13.2

0.75

2.74

2.76

2.86

0.43

9.53

72.3

C0002L 8X-4

346

10.5

0.45

1.78

0.77

3.17

0.70

6.86

65.4

C0002L 9X-5

356

9.1

0.76

1.66

0.85

2.15

0.70

6.13

67.7

C0002L 11X-4

375

9.7

0.62

1.76

3.52

3.65

1.06

10.62

109.2

C0002L 12X-7

388

8.8

0.76

2.01

1.21

4.01

1.22

9.22

104.8

C0002L 13X-1

392

4.3

0.35

1.34

0.46

2.69

0.58

5.42

125.2

C0002L 16X-3

422

7.4

0.28

1.57

0.81

2.79

0.61

6.07

81.6

C0002L 17X-4

432

8.5

0.41

1.15

2.33

3.38

0.87

8.14

96.1

C0002L 19X-3

451

6.6

0.21

1.46

1.40

2.70

0.27

6.05

91.8

C0002L 24X-5

501

7.6

1.06

2.56

2.10

1.63

0.63

7.97

104.9

C0002B 16R-3

612

3.9

0.44

0.61

0.89

2.71

0.24

4.90

125.5

C0002B 27R-2

714

3.7

0.03

0.96

0.64

1.74

0.65

4.03

108.6

C0002L 37R-2

807

4.0

0.10

1.95

0.81

1.67

0.22

4.74

117.5

C0002B 38R-3

818

4.4

0.11

0.96

1.07

2.36

0.51

5.01

114.9

C0002B 59R-2

1011

6.5

0.07

0.35

0.69

7.35

1.03

9.48

146.7