(b).
| Reference (sample type) | Sample type/region/community | Ni | Co | Cr | Se | Sb | Sr | Rb |
|---|---|---|---|---|---|---|---|---|
| Basu et al. 2011 [57] | Urine/Upper East region/ | 6.51 μgL−1 | 2.32 μgL−1 | 26.58 μgL−1 | 39.4 μgL−1 | — | — | — |
| Asante et al. 2012 [59] | Urine/Greater Accra region/ | — | — | — | — | 1.1 (0.6) μgL−1 | 142 (108) μgL−1 | 2090 (1070) μgL−1 |
| Fianko et al. 2007 [61] | Rivers supplying water to Iture Estuary | — | — | — | — | — | — | — |
| Sorowie | — | — | — | 2.1 μgL−1 | — | — | — | |
| Kakum | — | — | — | 1.9 μgL−1 | — | — | ||
| Asante et al. 2007 [15] | Urine (mine workers)/Western region/Tarkwa and its environ | — | 404.6 (174–676) μgL−1 | — | 3267.13 (207–8120) μgL−1 | 4.36 (0.8–8) μgL−1 | — | 243.89 (21–545) μgL−1 |
| Asante et al. 2007 [15] | Urine (non-mine workers)/Western region/Tarkwa and its environ | — | 397.98 (72.7–580) μgL−1 | — | 4394.12 (210–9660) μgL−1 | 8.17 (1–22) μgL−1 | 217.93 (15.6–558) μgL−1 | |
| Asante et al. 2012 [59] | Urine (e-waste recycling workers)/Greater Accra region/Agbogbloshie | — | 0.09 (0.049–0.22) μgL−1 | — | 0.1 (<0.1–0.4) μgL−1 | <0.1 (<0.1–0.16) μgL−1 | 124 (56.8–197) μgL−1 | 3.85 (1.09–6.75) μgL−1 |