Table 4 An indication of the magnitude of exposure to selected detected hazardous pesticides based on the estimate of per capita consumption/day compared to WHO’s Acceptable daily intake ADI and Acute reference dose (ARfD) limits. Data are based on recommended per capita consumption of 0.7 g/person/annum for leaf vegetable consumption in Africa (see WHO/GEMS/FOODS, 2006; Alla et al. 2015). Data on (ADI) and (ARfD) obtained from WHO online database (WHO, 2017)
| Active ingredient | Range of detected quantity (mg/kg) | Overall mean detected quantity (mg/kg) |
Codex Alimentarius MRLs (mg/kg) |
aPercapita consumption/day (mg/kg) |
bAcceptable daily intake (ADI) (mg/kg bw/day) |
bAcute reference dose (ARfD) (mg/kg bw) |
|---|---|---|---|---|---|---|
| Acephate | 0.05–0.89 | 0.60 | 0.01 | 0.0042 | 0.03 | 0.1 |
| Chlorpyriphos | 0.02–0.16 | 0.09 | 0.01 | 0.00063 | 0.01 | 0.1 |
| Methamidophos | 0.02–2.90 | 0.33 | 0.01 | 0.00231 | 0.004 | 0.01 |
| Methomyl | 0.01–0.67 | 0.19 | 0.01 | 0.00133 | 0.02 | 0.02 |
| Chlorfenapyr | 0.01–0.39 | 0.21 | 0.01 | 0.00147 | 0.03 | 0.03 |