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Table 7 Calibration for the foil standards: content in standard sample measured with ICP-MS and its calibrated value from µXRF

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 1091 1378 167 241 1158 244 52,207
 µXRF 1119 1444 181 262 1158 277 52,978
Std 2
 ICP-MS 615 772 92 131 630 137 27,528
 µXRF 513 628 89 120 647 125 25,418
Std 3
 ICP-MS 430 544 63 91 434 94 14,482
 µXRF 441 530 52 78 402 73 15,120
Std 4
 ICP-MS 51 68 5 9 34 8 1108
 µXRF 72 129 0 12 49 0 1858
Std 5
 ICP-MS 36 74 3 4 16 4 529
 µXRF 78 105 0 0 16 0 480
Std 1
 RSE  % 1.27 2.34 4.02 4.17 0.00 6.33 0.73
Std 2
 RSE  % 9.04 10.29 1.66 4.38 1.33 4.58 3.99
Std 3
RSE  % 1.26 1.30 9.57 7.69 3.83 12.57 2.16
Std 4
RSE  % 17.07 30.96 100.00 14.29 18.07 100.00 25.29
Std 5
RSE  % 36.84 17.32 100.00 100.00 0.00 100.00 4.86
  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