Table 6.
Mn, Fe, Hg, Cu, and Ni concentrations of the investigated antidiabetic herbal preparations.
| Drug code | Metal concentration (ppm) | ||||
|---|---|---|---|---|---|
| Mn | Fe | Hg | Cu | Ni | |
| S 1 | 12.2 ± 1.9 | 27.1 ± 1.4 | BDL | BDL | BDL |
| S 2 | 5.06 ± 1.9 | 37 ± 1.3 | BDL | BDL | BDL |
| S 3 | 3.82 ± 1.9 | BDL | BDL | BDL | BDL |
| S 4 | 0.75 ± 1.9 | 33.8 ± 1.3 | BDL | BDL | BDL |
| S 5 | 411 ± 9 | 47991 ± 291 | 39.08 ± 1.6 | 75.8 ± 3.1 | 22.7 ± 2 |
| S 6 | 186 ± 3 | 39786 ± 476 | 835 ± 10 | 28.5 ± 2.3 | 5.64 ± 1.5 |
| S 7 | 86.8 ± 1.5 | 26635 ± 398 | 686 ± 10 | 20.7 ± 2.5 | 2.85 ± 1.6 |
| S 8 | 562 ± 11 | 59374 ± 722 | 660 ± 10 | 5716 ± 173 | 174 ± 2 |
| S 9 | 56.5 ± 2 | 47960 ± 678 | 470 ± 10 | 8.57 ± 3.4 | BDL |
| S 10 | 398 ± 9 | 50688 ± 593 | 829 ± 10 | 106 ± 3 | 19.4 ± 1.8 |
| S 11 | 344 ± 9 | 56302 ± 649 | 871 ± 10 | 94.2 ± 3.1 | 13.7 ± 2 |
| S 12 | 31.6 ± 1.9 | 11530 ± 13 | 448 ± 10 | 9.25 ± 3.3 | BDL |
| S 13 | 61.5 ± 1.3 | 255 ± 3 | 19.8 ± 0.6 | 2.38 ± 0.8 | 1.46 ± 0.7 |
| S 14 | 29.5 ± 1.3 | 776 ± 13 | 2.2 ± 0 | BDL | BDL |
| S 15 | 21.8 ± 1.3 | 192 ± 3 | 37.6 ± 1.3 | BDL | 1.8 ± 0.7 |
| S 16 | 28.3 ± 1.2 | 89.6 ± 1.2 | 62.4 ± 1.3 | BDL | BDL |
| S 17 | 82.6 ± 1.3 | 4440 ± 30 | 37.5 ± 1.3 | BDL | 3.19 ± 0.7 |
| S 18 | 115 ± 1 | 4738 ± 32 | 39.5 ± 1.4 | BDL | 3.41 ± 0.7 |
| S 19 | 86.3 ± 1.3 | 1089 ± 13 | 35.9 ± 1.3 | BDL | 5.3 ± 0.7 |
| S 20 | 62.5 ± 1.6 | 407 ± 5 | 4.55 ± 0 | 2.82 ± 2.9 | 4.22 ± 1.8 |
| S 21 | 16.1 ± 1.6 | 94.8 ± 1.6 | 0.27 ± 0 | BDL | BDL |
| S 22 | 107 ± 2 | 333 ± 3 | 79.6 ± 1.7 | BDL | 3.66 ± 0.9 |
| S 23 | 102 ± 2 | 424 ± 5 | BDL | 7.92 ± 3.3 | 2.71 ± 2.1 |
| S 24 | BDL | 20.9 ± 1.5 | BDL | BDL | BDL |
| MRL | 0.26 | N/A | 0.01 | 0.10 | 0.60 |
BDL = below detection limit, MRL = maximum residual limit, and N/A = not available.