Elements

SRM 1643e Certified Value (µg/L)^a

Mean Measured Value (µg/L)

Recovery (%)

Aluminum

141.8 ± 8.6

133.713

94.29

Antimony

58.30 ± 0.61

46.376

79.55

Arsenic

60.45 ± 0.72

54.301

89.83

Barium

544.2 ± 5.8

480.706

88.33

Beryllium

13.98 ± 0.17

13.335

95.39

Bismuth

14.09 ± 0.15

14.079

99.92

Boron

157.9 ± 3.9

na

na

Cadmium

6.568 ± 0.073

5.311

80.86

Calcium

32.300 ± 1.100

28226.9

87.39

Chromium

20.40 ± 0.24

18.534

90.85

Cobalt

27.06 ± 0.32

21.647

79.99

Copper

22.76 ± 0.31

23.367

102.6

Iron

98.1 ± 1.4

87.97

89.67

Lead

19.63 ± 0.21

13.789

70.24

Lithium

17.4 ± 1.7

20.282

116.56

Magnesium

8.037 ± 98

7053.1

87.76

Manganese

38.97 ± 0.45

34.991

89.79

Molybdenum

121.4 ± 1.3

116.976

96.36

Nickel

62.41 ± 0.69

54.836

87.86

Potassium

2034 ± 29

1952.96

96.02