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Table 4 Calibration for the liquid standards: content in standard sample measured with ICP-MS and the calculated value from the µXRF calibration

From: Analysis of trace metal distribution in plants with lab-based microscopic X-ray fluorescence imaging

Standard samples

K [mg kg−1]

Ca [mg kg−1]

Mn [mg kg−1]

Fe [mg kg−1]

Ni [mg kg−1]

Cu [mg kg−1]

Zn [mg kg−1]

Std 1

 ICP-MS

195

200

275

279

293

318

327

 µXRF

194

203

274

272

294

315

327

Std 2

 ICP-MS

98

100

137

140

147

159

164

 µXRF

101

86

140

154

146

166

162

Std 3

 ICP-MS

49

50

69

70

73

79

82

 µXRF

47

61

67

62

74

75

82

Std 1

 RSE  %

0.26

0.74

0.18

1.27

0.17

0.47

0.26

Std 2

 RSE  %

1.51

7.53

1.08

4.76

0.34

2.15

1.51

Std 3

 RSE  %

2.08

9.91

1.47

6.06

0.68

2.60

0.00

  1. The relative standard error percentage (SE/mean  %, with n = 2 and SE = STDEV/sqrt(n)) shows the difference between the µXRF result and the ICP-MS
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Plant Methods

ISSN: 1746-4811