The average lead concentration (lg g1 wet weight) is 0.77 ± 0.47 (n = 55) for sardine. For mackerel Bella brand recorded the highest (0.69 lg g1 wet weight, n = 71) whereas the rest recorded below detection (<0.01). For tuna brand canned fishes Pomo tuna flakes recorded the highest (0.3 lg g1 wet weight,n = 10) whereas the rest recorded below detection (<0.01). For canned sardine B.B. brand recorded the highest (1.44 lg g1 wetTable 4 Results for Hg, Cd and Pb in certified reference material (CRM-IAEA 407 fish tissue).Metal Range (lg g1) Average (lg g1) IAEA range (lg g1) IAEA average (lg g1)Hg 0.213–0.216 0.215 (n = 4) 0.216–0.228 0.222 Cd 0.184–0.187 0.186 (n = 4) 0.185–0.193 0.189 Pb 0.115–0.118 0.117 (n = 4) 0.10–0.14 0.120 Table 5 Range of values of metals in canned fishes from local markets in Ghana (lg g1 wet weight).Metal Mackerel Sardine Pilchards Tuna FAO/WHO (1972) standards (lg g1)Hg <0.01–0.08 (n = 84) 0.01–0.04 (n = 75) 0.01–0.03 (n = 6) 0.12–0.20 (n = 15) 0.5 Cd <0.01–0.44 (n = 68) <0.01 (n = 64) <0.01 (n = 6) <0.01–0.45 (n = 13) 0.5 Pb <0.01–0.69 (n = 71) <0.01–1.44 (n = 55) <0.01 (n = 3) <0.01–0.3 (n = 10) 2.0 n: number of samples analyzed.FAO/WHO, 1972. weight, n = 55) whereas Flash brand canned sardine recorded the lowest (0.05 lg g1 wet weight, n = 55). All the pilchard brands recorded lead concentration below detection (<0.01).
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