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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