Research Article
Comparative Study of Heavy Metal Concentration in Eggs Originating from Industrial Poultry Farms and Free-Range Hens in Kosovo
Table 1
Average concentrations and standard deviation of metals in hen eggs from poultry farms and free-range hens in parts per billion (μg kg−1).
| Elements/Eggs | Range (μg kg−1) | Mean ± SD (μg kg−1) | Element presented on samples (%) |
| Chromium (Cr) | 0.48–8.45 | 3.58 ± 3.041 | 32 | Poultry farms | 0.85–8.45 | 5.03 ± 3.23 | 30 | Free-range hens | 0.48–3.33 | 1.65 ± 1.49 | 30 | Manganese (Mn) | 38.77–289.00 | 154.49 ± 74.26 | 100 | Poultry farms | 38.77–268.78 | 145.27 ± 73.00 | 100 | Free-range hens | 79.50–289.00 | 176.04 ± 69.00 | 100 | Iron (Fe) | 4286.59–15383.74 | 8220.55 ± 2708.03 | 100 | Poultry farms | 4286.59–11942.41 | 7894.50 ± 2105.63 | 100 | Free-range hens | 4749.38–15383.80 | 9179.85 ± 3411.90 | 100 | Nickel (Ni) | 0.45–144.74 | 18.28 ± 34.72 | 73 | Poultry farms | 2.83–144.74 | 25.63 ± 48.24 | 66 | Free-range hens | 0.45–144.80 | 26.65 ± 48.97 | 80 | Copper (Cu) | 61.68–550.59 | 243.39 ± 150.25 | 100 | Poultry farms | 61.68–517.52 | 251.30 ± 151.50 | 100 | Free-range hens | 64.08–550.59 | 265.92 ± 278.95 | 100 | Zinc (Zn) | 1078.04–11378.56 | 4222.32 ± 2697.22 | 100 | Poultry farms | 1078.04–7587.63 | 4043.50 ± 2622.76 | 100 | Free-range hens | 1452.31–11378.56 | 4923.24 ± 2952.40 | 100 | Arsenic (As) | 0.29–35.42 | 2.96 ± 7.34 | 100 | Poultry farms | 0.29–1.31 | 0.805 ± 0.33 | 100 | Free-range hens | 0.36–35.42 | 5.196 ± 10.70 | 100 | Cadmium (Cd) | 0.27–6.54 | 2.18 ± 2.57 | 32 | Poultry farms | 0.83–6.54 | 4.16 ± 2.97 | 25 | Free-range hens | 0.27–1.71 | 0.70 ± 0.68 | 40 | Mercury (Hg) | 0.04–1.41 | 0.34 ± 0.33 | 77 | Poultry farms | 0.07–1.41 | 0.39 ± 0.47 | 66 | Free-range hens | 0.04–0.52 | 0.28 ± 0.14 | 100 | Lead (Pb) | 12.85–71.80 | 32.92 ± 23.18 | 36 | Poultry farms | 35.51–71.80 | 57.40 ± 19.26 | 25 | Free-range hens | 12.84–26.43 | 18.22 ± 5.96 | 50 |
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SD, standard deviation.
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