Table 2.
Distribution of OP insecticide concentrations in umbilical cord blood plasma samples (ng/mL) at delivery, Zhejiang Province, China (n=237)
| Organophosphate | LOD | N >LOD (%) | 50th | 75th | 90th | 95th | 99th | Max |
|---|---|---|---|---|---|---|---|---|
| Acephate | 0.10 | 7 (3.0) | ND | ND | ND | ND | 0.57 | 0.68 |
| Chlorpyrifos | 0.40 | 87 (36.7) | ND | 0.56 | 1.92 | 2.71 | 4.65 | 7.33 |
| Chlorpyrifos-methyl | 0.01 | 18 (7.6) | ND | ND | ND | 0.07 | 0.47 | 1.14 |
| Fensulfothion | 0.03 | 1 (0.4) | ND | ND | ND | ND | ND | 10.35 |
| Fosthiazate | 0.07 | 1 (0.4) | ND | ND | ND | ND | ND | 7.82 |
| Isofenphos-methyl | 0.13 | 2 (0.8) | ND | ND | ND | ND | ND | 14.70 |
| Methamidophos | 1.52 | 153 (64.6) | 6.11 | 28.10 | 59.60 | 113.71 | 231.96 | 496.86 |
| Methidathion | 0.07 | 1 (0.4) | ND | ND | ND | ND | ND | 9.23 |
| Mevinphos | 0.12 | 15 (6.3) | ND | ND | ND | 0.14 | 0.25 | 0.26 |
| Naled | 0.42 | 236 (99.6) | 1.51 | 4.33 | 9.17 | 12.22 | 22.13 | 29.23 |
| Omethoate | 1.35 | 19 (8.0) | ND | ND | ND | 1.83 | 4.37 | 9.34 |
| Phorate | 1.79 | 40 (16.9) | ND | ND | 3.10 | 5.14 | 7.02 | 12.82 |
| Terbufos | 0.33 | 3 (1.3) | ND | ND | ND | ND | 0.39 | 3.32 |
| Trichlorfon | 0.35 | 121 (51.0) | 0.46 | 1.69 | 3.65 | 5.52 | 10.56 | 11.30 |
| * Carbophenothion sulfone | 0.02 | 16 (6.8) | ND | ND | ND | 0.49 | 1.64 | 18.83 |
| * DEDTP | 0.06 | 2 (0.8) | ND | ND | ND | ND | ND | 0.69 |
| * DMTP | 1.35 | 1 (0.4) | ND | ND | ND | ND | ND | 9.24 |
| * TCPY | 2.32 | 1 (0.4) | ND | ND | ND | ND | ND | 13.52 |
Undetected:
Diazinon, Dicrotophos, Dimethoate, Formothion, Phosphamidon, Dimethylvinphos, Parathion-methyl, Malathion, Dichlorphos, Monocrotophos, *Phorate sulfone, *DMDTP
*
Denotes a metabolite
Abbreviations: ND, non-detect; DEDTP, diethyldithiophosphate; DMTP, dimethylthiophosphate, TCPY, 3,5,6-trichloro-2-pyridinol; DMDTP, dimethyldithiophosphate