Table 3 Validation of the micro-wave assisted digestion method against certified reference material (Oriental tobacco leaves, CTA-OTL-1), n = 6

264.03 ± 5.14

3.29

104.77

1.07 ± 0.07

5.42

107.97

136 ± 5

141.59 ± 3.2

2.85

104.11

258^a

248.11 ± 4.77

2.76

96.17

0.154^b ± 0.007

0.167^b ± 0.009

5.73

108.44

1.49 ± 0.14

1.525 ± 0.076

1.64

102.35

5.12 ± 0.2

5.48 ± 0.02

4.8

107.03

43.6 ± 1.4

44.85 ± 0.05

1.99

102.87

0.138^b ± 0.01

0.144^b ± 0.01

3

104.35

2.23 ± 0.12

2.386 ± 0.005

4.78

106.99

0.972^b ± 0.147

0.965^b ± 0.028

0.51

99.28