Concentration (mg kg−1 product) Element Experimental data Literature data Maximum acceptable residual level Canned meat Hg 0.00001–0.00007 0.001–2 [52 ]; 0.125 in d.w. [46 ]; <LOQ-0.840, <LOQ-0.900, <LOQ-0.980, <LOQ-1.220, [65 ] — As 0.002–0.003 < LOQ [66 ] 0.20 [67 ] Cd <LOQ-0.02731 1 [66 ]; 4.08 d.w. [46 ]; 0.06–0.27 (mean 0.60) and 0.06–0.10 (mean 0.08) [47 ]; 0.020–0.220 [45 ]; <LOQ-0.110, <LOQ-0.100, <LOQ-0.090 [65 ] 0.05 [26 ], 0.50 [68] Pb 0.013–0.395 4–4.20 [66 ]; 15.43 in d.w. [46 ]; 0.53–2.07 (mean 1.3) 0.52–1.19 (mean 0.85) [47 ]; 0.15–2.06 [45 ]; <LOQ-1.14, <LOQ-0.630, <LOQ-0.830 [65 ] 0.10 [26 ], 0.50 [26 ], 0.50 [69 ], [70 ] Sn 0.005–0.174 <LOQ-6.220, <LOQ-6.350, <LOQ-5.280, <LOQ-5.460 [65 ] 200 [26 ], 250 [71 ] Fish and canned fish Hg 0.00610–0.07840 0.043–0.253 [16 ]; 0.18–0.86 [41 ]; 0.053–0.7396, 0.0195–0.0489 [18 ]; 0.07–0.22 [72 ]; <LOQ-1.14 [17 ]; 0.0001–0.0003 [52 ]; 0.0378–0.5243 [73 ]; 0.60–0.62 [74 ]; 0.088–0.410, [43 ]; 0.005–1.17 [39 ], 0.140–0.327 in d.w. [75 ], 0.094–0.466 [76 ], 0.16–0.53 [77 ] 0.50 and 1.0 (tuna) [26 ] As 0.359–1.481 0.0369–0.2618 [16 ]; <LOQ-1 [66 ]; 0.49–25.26 [35 ]; <LOQ-1.72, <LOQ-0.15 [18 ]; 1.03–1.41 [72 ], 0.004–0.073 in d.w. [75 ], 0.105–0.333 [76 ], 0.003–0.08 [77 ] 4 [67 ] Cd 0.0033–0.0754 0.0046–0.0720 [16 ]; 0.002–0.07 [78 ]; 1.00–1.80 [66 ]; 0.08–0.66 [41 ]; 0.0–53.9 [18 ]; 0.019 [79 ]; <LOQ-0.09 [17 ]; 0.08 [36 ]; 0.0032–0.0834 [73 ]; 0.020–0.025 [74 ]; <LOQ-0.007 [39 ]; 0.03–0.12 [37 ]; <LOQ-0.18 [40 ]; 0.19–17.05 [80 ], 0.008–0.191 in d.w. [75 ], 0.021–0.082 [76 ], 0.01–0.21 [77 ] 0.050 and 0.10 (sardine, tuna) [26 ] Pb 0.011–0.296 0.0126–0.0726 [16 ]; 0.007–0.51 [78 ]; 3–4.60, 3.60–4.00 [66 ]; 0.14–0.92 [41 ]; 0.02–1.37 [35 ]; 0.0–31.1 [18 ]; 0.11 [79 ]; <LOQ-4.13 [17 ]; 0.10 [36 ]; <LOQ-3.19, 0.35–2.10, 0.25–1.51 in d.w. [42 ]; 0.0043–0.0856 [73 ]; 0.011–0.089 [74 ]; 0.058–0.168 [43 ]; 0.07–0.32, 0.04–0.32 [39 ]; 0.18–0.38 [37 ]; 0.05–0.34 [40 ]; 0.12–78.42 [80 ], 0.014–1.518 in d.w. [75 ], 0.019–0.084 [76 ], 0.048–1.30 [77 ] 0.30 [26 ] Sn 0.018–1.362 0.023–13.108 [78 ]; 0.14–4.03 [35 ]; 0.15–6.34 [40 ]; 0.04–28.7 [18 ] 200 [26 ]