1

2

3

4

C

74.72 ± 0.11

57.86 ± 0.12

41.85 ± 0.14

37.93 ± 0.14

O

24.67 ± 0.11

40.01 ± 0.12

52.85 ± 0.14

57.40 ± 0.14

Ca

0.44 ± 0.01

1.80 ± 0.02

4.66 ± 0.03

3.99 ± 0.03

Na

0.03 ± 0.01

0.14 ± 0.02

0.31 ± 0.02

0.30 ± 0.02

Mg

---

0.04 ± 0.01

0.05 ± 0.01

0.04 ± 0.02

S

---

---

---

---

Cl

0.14 ± 0.01

0.06 ± 0.01

0.05 ± 0.01

0.03 ± 0.01

Ni

---

0.03 ± 0.01

---

0.02 ± 0.01

Sr

---

0.06 ± 0.02

0.24 ± 0.03

0.29 ± 0.03