| Elements | Certified values | This work |
| Na K Br Sm La Zn Sc Yb | 24.4 ± 1.20 16100 ± 3.22 1.80 3.00 20.00 12.5 ± 0.30 0.03 0.30 | 28.91 ± 0.35 16490 ± 82.45 1.62 ± 0.07 3.72 ± 0.02 23.09 ± 0.09 9.55 ± 1.75 0.033 ± 0.007 0.20 ± 0.04 |