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 |