Element

Reference Value (µg・g⁻¹)

Found Value (µg・g⁻¹)

% Recovery Yield

Ni

42.9 ± 3.7

38.8 ± 1.1

90 ± 0.03

Co

13.5 ± 0.43

12.6 ± 0.3

93 ± 0.02

Mn

544 ± 21

524 ± 14.0

96 ± 0.03

As*

17

16.1 ± 0.5

94 ± 0.03

Cr

121.9 ± 3.8

110.2 ± 5.3

91 ± 0.04

Pb

150 ± 17.0

135.5 ± 6.7

90 ± 0.04