Table 3.
Extraction recoveries of 11 OP pesticides at low and medium levels in serum and milk samples.
| Pesticides | QC concentration ; low, medium) (ng mL−1) |
Absolute recovery ; mean ± SD |
Relative recovery ; mean ± SD |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Serum samples | Milk samples | Serum samples | Milk samples | ||||||
| Low level (n=3) |
Medium level (n=3) |
Low level (n=3) |
Medium level (n=3) |
Low level (n=3) |
Medium level (n=3) |
Low level (n=3) |
Medium level (n=3) |
||
| Dicrotophos | 1.6, 3.2 | 39±8.9 | 50±10.6 | 45±8.1 | 65±9.3 | 69±2.4 | 68±3.5 | 75±13 | 71±0.2 |
| Dimethoate | 0.8, 1.6 | 37±172 | 52±4.2 | 42±9.0 | 69±8.9 | 62±2.9 | 72±4.1 | 65±7.9 | 79±3.7 |
| Diazinon | 5.0, 10 | 49±5.6 | 57±2.3 | 48±6.5 | 65±4.3 | 61±1.2 | 90±3.6 | 72±20 | 81±8.6 |
| Parathion-methyl | 4.0, 8.0 | 49±2.1 | 50±5.7 | 54±8.9 | 71±9.5 | 66±1.8 | 78±3.9 | 90±11 | 82±1.8 |
| Malathion | 0.6, 1.2 | 50±4.8 | 51±7.7 | 53±3.8 | 67±4.1 | 76±1.7 | 93±2.8 | 86±12 | 78±4.9 |
| Chlorpyrifos | 3.0, 6.0 | 55±5.2 | 53±2.5 | 58±8.4 | 74±5.6 | 84±0.6 | 95±2.8 | 84±14 | 78±8.6 |
| Pirimiphos-ethyl | 1.6, 3.2 | 58±5.6 | 54±9.2 | 51±5.4 | 68±2.8 | 94±1.1 | 86±3.6 | 60±14 | 79±2.1 |
| Prothiophos | 0.8,1.6 | 38±3.5 | 51±6.9 | 58±1.4 | 66±2.4 | 68±1.4 | 61±2.8 | 72±16 | 71±5.7 |
| Profenofos | 4.0,8.0 | 36±6.3 | 46±2.3 | 54±4.1 | 69±7.9 | 62±2.1 | 95±2.7 | 68±7.1 | 81±2.1 |
| Ethion | 1.0,2.0 | 38±5.4 | 51±5.9 | 45±2.3 | 61±4.7 | 63±1.8 | 59±1.7 | 68±7.1 | 84±3.4 |
| Triazophos | 5.0,10 | 39±2.5 | 43±6.0 | 51±3.6 | 71±4.9 | 61±2.0 | 76±1.9 | 64±2.3 | 85±1.6 |
S.D. = standard deviation