| Location | Sample | Total chemical element in mg/kg | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Sourced | Identity | As | Cd | Cr | Cu | Fe | Hg | Mn | Ni | Pb | Zn |
Pemba | Kigoma | KIG 01 | 0.290 | <0.001 | 114 | 58.6 | 85607 | <0.001 | 289 | 59.0 | <0.01 | 101 |
 | KIG 02 | 0.490 | <0.001 | 146 | 62.4 | 88382 | <0.001 | 288 | 60.7 | <0.01 | 104 | |
 | KIG 03 | 0.310 | <0.001 | 111 | 63.1 | 89756 | <0.001 | 283 | 63.4 | <0.01 | 78.1 | |
 | KIG 04 | 0.270 | <0.001 | 119 | 68.0 | 87269 | <0.001 | 284 | 63.9 | <0.01 | 80.4 | |
 | Mean | 0.340 | - | 123 | 63.0 | 87754 | - | 286 | 61.8 | - | 90.9 | |
 | SD | 0.101 | - | 16.0 | 3.9 | 1756 | - | 2.9 | 2.3 | - | 13.5 | |
Musoma | MSG 01 | 0.200 | <0.001 | 65.0 | 27.5 | 34643 | <0.001 | 1290 | 4.0 | 1.9 | 20.7 | |
 | MSG 02 | 0.190 | <0.001 | 68.5 | 27.9 | 34534 | <0.001 | 1312 | 4.7 | 2.8 | 23.1 | |
 | MSG 03 | 0.460 | <0.001 | 98.3 | 58.9 | 34663 | <0.001 | 1436 | 42.2 | <0.01 | 68.3 | |
 | MSG 04 | 0.390 | <0.001 | 94.7 | 58.9 | 35491 | <0.001 | 1400 | 42.4 | <0.01 | 28.1 | |
 |  | Mean | 0.310 | - | 81.6 | 43.3 | 34833 | - | 1360 | 23.3 | 2.4 | 35.1 |
 |  | SD | 0.136 | - | 17.3 | 18.0 | 442 | - | 69.7 | 21.9 | 0.636 | 22.4 |
Kichuguu | Katolo | KTG 01 | 4.8 | 0.025 | 108 | 61.5 | 35878 | 0.039 | 861 | 51.3 | 7.4 | 45.5 |
 | KTG 02 | 4.6 | <0.001 | 98.5 | 62.3 | 57916 | 0.065 | 762 | 53.8 | 6.4 | 38.5 | |
Rwamagasa | RWG 01 | 14.8 | 0.092 | 97.3 | 79.7 | 55983 | 0.056 | 671 | 45.4 | 2.9 | 101 | |
 | RWG 02 | 19.7 | 0.220 | 287 | 169 | 68922 | 0.075 | 1325 | 128 | 3.9 | 112 | |
Geita | GTG 01 | 0.790 | <0.001 | 103 | 46.4 | 33884 | 0.020 | 571 | 60.8 | 1.5 | 24.4 | |
 | GTG 02 | 3.0 | 0.044 | 41.5 | 67.4 | 43929 | 0.037 | 828 | 39.4 | 6.0 | 27.8 | |
Kasamwa | KSG 01 | 3.1 | 0.035 | 133 | 53.8 | 45600 | 0.039 | 1303 | 65.9 | 6.2 | 28.7 | |
 | KSG 02 | 4.5 | 0.035 | 68.8 | 58.7 | 51649 | 0.032 | 1243 | 43.4 | 5.8 | 30.7 | |
Nyankumbu | NYG 01 | 3.2 | 0.016 | 132 | 50.0 | 42919 | 0.015 | 1343 | 69.8 | 5.8 | 25.6 | |
 | NYG 02 | 5.3 | <0.001 | 108 | 52.9 | 38765 | 0.041 | 529 | 55.9 | 7.0 | 26.8 | |
Bukoli | BKG 01 | 3.3 | 0.016 | 73.0 | 63.4 | 46401 | 0.022 | 761 | 83.1 | 9.4 | 41.8 | |
 | BKG 02 | 3.6 | <0.001 | 99.9 | 51.1 | 45912 | 0.052 | 602 | 56.6 | 8.3 | 45.3 | |
Chikobe | CHG 01 | 5.0 | <0.001 | 246 | 69.9 | 72204 | 0.072 | 2515 | 101 | 11.3 | 34.5 | |
 | CKG 02 | 5.9 | 0.016 | 216 | 61.4 | 56838 | 0.074 | 1251 | 113 | 8.7 | 29.2 | |
 |  | Mean | 5.8 | 0.055 | 129 | 67.7 | 49771 | 0.046 | 1040 | 69.1 | 6.5 | 43.7 |
 |  | SD | 5.1 | 0.066 | 70.7 | 30.5 | 11501 | 0.020 | 522 | 27.3 | 2.6 | 27.6 |