Table 2 Mean concentration (n = 3, \( \overline{\mathrm{x}} \) ± SD mg/kg dry weight) and %RSD of metals in mushroom and substrate samples

Dry ashing

PO

49.65 ± 1.75

3.53

200.12 ± 6.64

3.32

87.07 ± 0.75

0.87

46.08 ± 2.33

5.05

ND

ND

Substrate

45.38 ± 2.86

6.30

287.18 ± 5.88

2.05

60.94 ± 0.72

0.18

56.28 ± 3.75

6.66

ND

ND

PF

52.68 ± 3.51

6.66

234.60 ± 6.64

2.83

93.60 ± 1.83

1.95

39.36 ± 2.33

5.92

ND

ND

Substrate

49.51 ± 4.29

8.66

257.70 ± 6.66

2.59

63.24 ± 1.11

1.75

60.61 ± 3.75

6.19

ND

ND

Wet digestion

PO

51.67 ± 3.04

5.88

226.05 ± 6.64

2.94

90.68 ± 0.96

1.06

47.04 ± 4.66

9.90

ND

ND

Substrate

50.33 ± 5.15

10.24

301.28 ± 4.44

1.47

62.67 ± 0.20

0.32

58.44 ± 6.49

11.11

ND

ND

PF

53.70 ± 1.75

3.27

245.21 ± 6.64

2.71

94.43 ± 1.83

1.93

41.67 ± 4.66

11.17

ND

ND

Substrate

52.81 ± 3.78

7.16

266.67 ± 5.88

2.20

64.05 ± 0.40

0.62

62.77 ± 3.75

5.97

ND

ND

Microwave digestion

PO

52.25 ± 1.81

3.46

236.43 ± 6.71

2.84

91.29 ± 0.93

1.02

49.53 ± 2.32

4.68

ND

ND

Substrate

51.20 ± 4.79

9.35

310.08 ± 6.71

2.17

64.04 ± 0.20

0.32

60.24 ± 4.02

6.67

ND

ND ND

PF

54.34 ± 1.81

3.33

251.94 ± 6.71

2.66

97.76 ± 0.54

0.55

42.84 ± 2.32

5.41

ND

ND

Substrate

53.29 ± 3.14

5.88

271.32 ± 6.71

2.44

65.45 ± 0.41

0.62

64.26 ± 4.02

6.25

ND

ND

Mean total

PO

51.19 ± 1.36

2.67

220.87 ± 18.70

8.47

89.68 ± 2.28

2.54

47.55 ± 1.78

3.74

ND

ND

Substrate

48.97 ± 3.14

6.41

299.51 ± 11.55

3.86

62.55 ± 1.55

2.48

58.32 ± 1.98

3.40

ND

ND

PF

53.56 ± 0.82

1.54

243.92 ± 8.74

3.58

95.26 ± 2.20

2.31

41.29 ± 1.77

4.29

ND

ND

Substrate

51.87 ± 2.06

3.97

265.23 ± 6.92

2.61

64.25 ± 1.12

1.74

62.55 ± 1.84

2.93

ND

ND