Table 3.
Determination of OPPs in water sample (nd = not detected and D = detected).
| OPPs | Vaal River water | Vaal Dam water | |||||
|---|---|---|---|---|---|---|---|
| spiked (μg/L) | Quantified (μg/L) | %R(a) | RSD % | Quantified (μg/L) | %R(a) | RSD % | |
| Azinphos methyl | 0 | D | D | ||||
| 10 | 9.1 | 90.8 | 3.8 | 9.4 | 93.6 | 6.5 | |
| 50 | 45.2 | 90.4 | 6.2 | 46.3 | 92.6 | 4.9 | |
| Chlorpyrifos | 0 | D | D | ||||
| 10 | 8.6 | 86.0 | 5.9 | 9.1 | 91.5 | 10.4 | |
| 50 | 46.7 | 93.5 | 5.6 | 46.9 | 93.8 | 5.5 | |
| Malathion | 0 | D | D | ||||
| 10 | 8.8 | 88.3 | 6.3 | 8.6 | 86.3 | 7.5 | |
| 50 | 42.0 | 84.0 | 9.6 | 43.1 | 86.2 | 2.9 | |
| Parathion | 0 | nd | D | ||||
| 10 | 10.1 | 101.4 | 4.8 | 8.9 | 88.7 | 5.9 | |
| 50 | 45.8 | 91.5 | 8.2 | 45.1 | 90.2 | 9.8 | |