Table III.
Calibration curve, LOD and LOQ of organochlorine pesticides in Heshouwu derived from the Wudang Mountain Area, as determined by gas chromatography.
| Compoundsa | Regression equation | Correlation coefficient | LOD (ng/ml) | LOQ (ng/ml) |
|---|---|---|---|---|
| α-BHC | Y=2.725X+3.482 | 0.9998 | 1.05 | 3.50 |
| PCNB | Y=1.963X+4.186 | 0.9996 | 0.95 | 3.16 |
| γ-BHC | Y=2.083X+10.650 | 0.998 | 0.84 | 2.80 |
| β-BHC | Y=2.805X+16.196 | 0.996 | 0.75 | 2.50 |
| p,p'-DDE | Y=1.049X+4.436 | 0.997 | 0.61 | 2.03 |
| δ-BHC | Y=1.751X+1.212 | 0.99995 | 0.97 | 3.23 |
| p,p'-DDDE | Y=1.796X-0.197 | 0.99990 | 1.03 | 3.43 |
| p,p'-DDT | Y=1.650X+1.975 | 0.9997 | 1.08 | 3.60 |
| o,p'-DDT | Y=1.965X+1.535 | 0.9998 | 0.98 | 3.27 |
a
Concentration range, 4–250 ng/ml. LOD, limit of detection; LOQ, limit of quantification; BHC, benzenehexachloride; PCNB, pentachloronitrobenzene; DDE, dichlorodiphenyldichloroethylene; DDT, dichlorodiphenyltrichloroethane; DDDE, dichlorodiphenyldichloroethane.