| Item | As | Pb | Cd | Cr | Ni | Cu | Zn |
| Mix (mg∙kg−1) | 14.21 | 24.77 | 4.11 | 75.86 | 33.21 | 21.63 | 208.80 |
| Max (mg∙kg−1) | 40.57 | 60.01 | 110.40 | 148.06 | 84.54 | 71.73 | 2444.00 |
| Mean (mg∙kg−1) | 22.20 | 35.27 | 38.52 | 116.59 | 50.30 | 45.69 | 1073.28 |
| SD | 5.53 | 7.49 | 28.82 | 15.51 | 10.38 | 9.82 | 641.78 |
| CV% | 24.91 | 21.25 | 74.81 | 13.30 | 21.53 | 21.49 | 59.80 |
| Background value* | 18.40 | 46.60 | 0.218 | 65.20 | 42.50 | 46.30 | 89.70 |