Table 3 Measurement results (in mg/kg) of certified reference materials ISE953 and ISE998.

From: Energy dispersive X-ray fluorescence characterization of soil and its geological provenance assessment – Mvengue subdivision of Cameroon

ISE953

Certified values

Measured values

Deviation*

ISE998

Certified values

Measured values

Deviation

Al2O3 (%)

24.79

24.10

2.78%

Al2O3 (%)

25.40

24.83

2.24%

SiO2 (%)

63.33

63.77

0.69%

SiO2 (%)

64.29

65.96

2.60%

K2O (%)

7.71

7.77

0.74%

K2O (%)

4.23

4.12

2.60%

CaO (%)

1.45

1.51

4.22%

CaO (%)

0.58

0.57

1.48%

Ti

2742

2865

4.49%

Ti

3758

3681

2.05%

    

P2O5 (%)

0.13

0.14

5.43%

MnO

1014

1067

5.23%

MnO

178.60

183.30

2.63%

Fe2O3 (%)

6.69

6.81

1.85%

Fe2O3 (%)

6.57

6.02

8.40%

  1. * Deviation values were calculated as the relative error between the measured values over certified values.
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