Samples

Concentration determined by phenol-sulfuric acid method (μg/mL)

Average concentration (μg/mL)

Concentration determined by aniline blue method (μg/mL)

Average concentration (μg/mL)

1

3528 ± 11

3369

228 ± 3

216

2

3269 ± 14

206 ± 2

3

3108 ± 23

203 ± 2

4

3192 ± 50

204 ± 2

5

3087 ± 87

197 ± 2

6

3367 ± 28

228 ± 4

7

3766 ± 21

236 ± 2

8

3647 ± 10

231 ± 1

9

3409 ± 35

207 ± 5

10

3318 ± 43

216 ± 10