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Table 3 Concentrations of Mn, Fe, Ni, Cu and Zn for the certified liquid standard

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

Sample

Mn [mg kg−1]

Fe [mg kg−1]

Ni [mg kg−1]

Cu [mg kg−1]

Zn [mg kg−1]

µXRF result

6.85

90.60

8.48

8.47

87.90

Certificate of analysis (manufacturer)

9.9 ± 0.5

100 ± 5

9.9 ± 0.5

9.9 ± 0.5

99 ± 5

RSE %

18.21

4.93

7.73

7.78

5.94

  1. Data from: (a) µXRF quantification, (b) datasheet of manufacturer (Merck). Data were collected for an area and the average of the pixel grey values was used. The relative standard error percentage (SE/mean %, with n = 2 and SE = STDEV/sqrt(n)) shows the difference between the µXRF result and the certificate of analysis
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