Table 1 Calibration data, LOD and LOQ, precision and stability of the GC-ECD method.
Pesticide | Calibration curve | R | Linear range (ng/mL) | LOD (ng/L) | LOQ (ng/L) | Precision (RSD, %) | Stability | |
|---|---|---|---|---|---|---|---|---|
Intra-day | Inter-day | |||||||
Hexachlorobenzene | y = 267887x−1090 | 0.9994 | 0.001–1.0 | 0.03 | 0.1 | 1.37 | 1.17 | 0.56 |
Alpha-BHC | y = 486771x−5297.1 | 0.9988 | 0.001–1.0 | 0.02 | 0.06 | 1.46 | 1.42 | 0.45 |
Quintozene | y = 277789x−1979.6 | 0.9992 | 0.001–1.0 | 0.04 | 0.1 | 0.65 | 0.98 | 0.64 |
Gamma-BHC | y = 376449x−4154.8 | 0.9990 | 0.001–1.0 | 0.04 | 0.1 | 0.97 | 1.01 | 0.42 |
Heptachlor | y = 251364x−4725.5 | 0.9982 | 0.001–1.0 | 0.1 | 0.25 | 1.13 | 2.12 | 1.09 |
Aldrin | y = 316138x−977.87 | 0.9996 | 0.001–1.0 | 0.06 | 0.2 | 2.06 | 1.55 | 1.05 |
Chlorothalonil | y = 114350x−6606.8 | 0.9955 | 0.01–1.0 | 3.0 | 7.0 | 9.86 | 9.63 | 10.15 |
Beta-BHC | y = 134236x−1070.8 | 0.9993 | 0.001–1.0 | 0.8 | 0.3 | 3.18 | 2.63 | 2.74 |
Delta-BHC | y = 288462x−4851.4 | 0.9984 | 0.001–1.0 | 0.06 | 0.2 | 0.86 | 1.08 | 1.19 |
Heptachlor epoxide | y = 344132x−4890.8 | 0.9979 | 0.001–1.0 | 0.03 | 0.1 | 1.80 | 1.67 | 0.66 |
Triadimefon | y = 79059x−3567.6 | 0.9953 | 0.01–1.0 | 0.2 | 0.6 | 6.07 | 11.95 | 4.35 |
Alpha-endosulfan | y = 188142x−841.17 | 0.9998 | 0.001–1.0 | 0.06 | 0.2 | 1.18 | 1.92 | 0.18 |
Cis-chlordane | y = 65993x−1028.7 | 0.9944 | 0.005–1.0 | 0.06 | 0.2 | 1.51 | 1.31 | 0.50 |
Trans-chlordane | y = 69098x−423.5 | 0.9995 | 0.001–1.0 | 0.06 | 0.2 | 1.76 | 1.57 | 0.68 |
p.p′-DDE | y = 264411x−2860.7 | 0.9992 | 0.001–1.0 | 0.06 | 0.2 | 1.06 | 3.97 | 0.70 |
Dieldrin | y = 286981x−1528.9 | 0.9996 | 0.001–1.0 | 0.06 | 0.2 | 1.67 | 1.56 | 0.70 |
Endrin | y = 236659x−4419.4 | 0.9934 | 0.001–1.0 | 0.06 | 0.2 | 1.37 | 1.82 | 1.10 |
o.p′-DDT | y = 124345x−4164.4 | 0.9951 | 0.005–1.0 | 0.5 | 1.8 | 4.13 | 3.04 | 3.11 |
p.p′-DDD | y = 145814x−3592.2 | 0.9958 | 0.001–1.0 | 0.04 | 0.2 | 3.10 | 7.80 | 2.85 |
Beta-endosulfan | y = 108103x−455.58 | 0.9996 | 0.001–1.0 | 0.1 | 0.4 | 1.66 | 1.79 | 0.78 |
p.p′-DDT | y = 124664x−5688.9 | 0.9925 | 0.005–1.0 | 0.6 | 2 | 6.71 | 4.03 | 4.08 |
Methoxychlor | y = 32286x−1594.7 | 0.9947 | 0.001–1.0 | 1 | 4 | 5.58 | 7.88 | 2.94 |
Fenpropathrin | y = 76768x−3037.3 | 0.9947 | 0.01–2.0 | 0.06 | 0.2 | 5.73 | 12.00 | 5.17 |
Permethrin | y = 188912x−9252.3 | 0.9876 | 0.01–2.0 | 2 | 6 | 5.06 | 7.07 | 5.27 |
Cypermethrin | y = 11359x−799.08 | 0.9909 | 0.1–2.0 | 1 | 4 | 3.18 | 12.25 | 3.48 |
Flucythrinate | y = 31926x−2328.4 | 0.9960 | 0.1–2.0 | 0.4 | 1.5 | 3.65 | 13.18 | 4.41 |
Decamethrin | y = 19245x−1451.4 | 0.9918 | 0.1–2.0 | 1 | 3 | 2.39 | 8.82 | 3.02 |
