Table 2 Qualitative analysis

40-keV MEI (+)

4.19 ± 0.82*

3.58 ± 0.97*

4.18 ± 0.69*

3.42 ± 0.79*

2.97 ± 0.77*

4.10 ± 0.79*

3.57 ± 0.73*

3.44 ± 0.77*

2.88 ± 0.54*

PEI

3.34 ± 0.85

2.99 ± 0.80

3.71 ± 0.79

2.86 ± 0.69

2.50 ± 0.69

3.45 ± 0.71

2.89 ± 0.61

2.69 ± 0.74

2.35 ± 0.49

Kappa

0.74

0.64

0.65

0.73

0.62

0.72

0.67

0.75

0.71