Research Article
Risk Assessment of Heavy Metals in Imported Frozen Fish Scomber scombrus Species Sold in Nigeria: A Case Study in Zaria Metropolis
Table 2
Mean and standard deviation of metals concentrations in the tissues of Scomber scombrus (mg⋅kg−1) wet weight.
| Tissue | Cd = 6) | Pb = 6) | Hg = 6) | Fe = 6) | Ni = 6) |
| Skin (RS) | 2.133 ± 0.025 | 17.150 ± 0.350 | 72.425 ± 0.030 | 16.700 ± 0.030 | 6.158 ± 0.010 | Skin (EU) | 1.158 ± 0.035 | 7.833 ± 0.005 | 66.542 ± 0.040 | 15.893 ± 0.020 | 9.025 ± 0.010 | Muscle (RS) | 2.192 ± 0.005 | 15.133 ± 0.010 | 75.692 ± 0.054 | 11.453 ± 0.020 | 6.042 ± 0.005 | Muscle (EU) | 2.375 ± 0.015 | 7.242 ± 0.010 | 73.400 ± 0.015 | 21.873 ± 0.025 | 8.942 ± 0.050 | Gills (RS) | 2.425 ± 0.015 |
15.942 ± 0.005 | 75.925 ± 0.005 | 234.81 ± 0.025 | 6.650 ± 0.010 | Gills (EU) | 1.125 ± 0.020 | 8.142 ± 0.015 | 80.358 ± 0.005 | 225.25 ± 0.010 | 9.067 ± 0.015 | Liver (RS) | 19.758 ± 0.030 | 16.617 ± 0.010 | 70.900 ± 0.010 | 375.93 ± 0.025 | 6.650 ± 0.020 | Liver (EU) | 10.658 ± 0.015 | 8.575 ± 0.005 | 73.958 ± 0.020 | 132.69 ± 0.040 | 8.108 ± 0.015 | Intestine (RS) | 7.692 ± 0.015 | 17.533 ± 0.020 | 71.342 ± 0.010 | 233.88 ± 0.045 | 6.800 ± 0.020 | Intestine (EU) | 5.492 ± 0.035 | 8.417 ± 0.020 | 75.875 ± 0.025 | 43.367 ± 0.045 | 8.558 ± 0.010 | Kidneys (RS) | 4.267 ± 0.040 | 17.558 ± 0.025 | 72.125 ± 0.015 | 70.780 ± 0.010 | 7.017 ± 0.005 | Kidneys (EU) | 5.408 ± 0.030 | 8.725 ± 0.015 | 66.600 ± 0.030 | 196.99 ± 0.035 | 8.650 ± 0.005 | Brain (RS) | 2.958 ± 0.015 | 16.942 ± 0.035 | 76.000 ± 0.010 | 57.580 ± 0.025 | 6.517 ± 0.100 | Brain (EU) | 1.600 ± 0.010 | 4.417 ± 0.025 | 68.650 ± 0.020 | 44.360 ± 0.040 | 8.233 ± 0.015 | Bones (RS) | 6.208 ± 0.010 | 16.708 ± 0.030 | 72.850 ± 0.030 | 52.807 ± 0.015 | 6.767 ± 0.010 | Bones (EU) | 1.608 ± 0.020 | 3.950 ± 0.015 | 70.558 ± 0.020 | 54.000 ± 0.015 | 8.167 ± 0.010 |
| FAO/WHO [18] | 0.100 | 0.400 | 0.500 | — | — |
| CCFAC [57] | — | — | — | 0.800 | — |
| WHO [64] | — | — | — | — | 0.200 |
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is the number of batches analyzed.
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