Year

B

Cu

Fe

Mn

Mo

Zn

2000 [12]

0.41

4.44

41.01

42.36

0.26

1.99

2006 [13]

0.39

3.38

34.35

40.21

0.20

1.86

2021 (See Table 2)

0.92

2.55

66.47

47.26

0.39

3.95