Table 4.
External and internal calibration data for 18 target organochlorine pesticides
|
Component |
Linear range (μg/L) |
External calibration* |
|
Internal calibration** |
|||
|---|---|---|---|---|---|---|---|
| Equation | Slope | R2 | Equation | Slope | R2 | ||
| α–HCH |
1.95-62.5 |
Y = 13.7X-2.04 |
13.74 |
0.9996 |
Y = 1.8X + 0.71 |
1.84 |
0.9994 |
| γ–HCH |
1.95-62.5 |
Y = 4.6X + 6.01 |
4.6327 |
0.9990 |
Y = 0.6X + 1.20 |
0.62 |
0.9987 |
| β–HCH |
1.95-62.5 |
Y = 12.9X-2.72 |
12.90 |
0.9996 |
Y = 1.7X + 0.53 |
1.73 |
0.9998 |
| δ–HCH |
1.95-62.5 |
Y = 13.1X-7.36 |
13.15 |
0.9989 |
Y = 1.8X-0.09 |
1.76 |
0.9982 |
| 4,4'-DDE |
1.95-62.5 |
Y = 10.1X + 10.21 |
10.03 |
0.9988 |
Y = 1.3X + 2.21 |
1.34 |
0.9991 |
| 4,4'-DDD |
1.95-62.5 |
Y = 8.6X + 10.91 |
8.67 |
0.9988 |
Y = 1.2X + 2.22 |
1.16 |
0.9988 |
| 4,4'-DDT |
1.95-62.5 |
Y = 7.2X + 9.99 |
7.21 |
0.9987 |
Y = 1.0X + 1.98 |
0.97 |
0.9984 |
| Heptachlor |
1.95-62.5 |
Y = 12.4X + 6.26 |
12.36 |
0.9999 |
Y = 1.6X + 1.83 |
1.65 |
0.9995 |
| Heptachlor epoxide |
1.95-62.5 |
Y = 10.6X + 14.67 |
10.66 |
0.9993 |
Y = 1.4X + 2.92 |
1.42 |
0.9988 |
| Endosulfan I |
1.95-62.5 |
Y = 10.0X + 16.38 |
10.05 |
0.9980 |
Y = 1.3X + 3.11 |
1.34 |
0.9980 |
| Endosulfan II |
1.95-62.5 |
Y = 6.3X + 8.96 |
6.34 |
0.9989 |
Y = 0.8X + 1.75 |
0.85 |
0.9995 |
| Endosulfan sulfate |
1.95-62.5 |
Y = 7.5X- 4.44 |
7.45 |
0.9990 |
Y = 1.0X-0.14 |
1.00 |
0.9999 |
| Aldrin |
1.95-62.5 |
Y = 11.2X + 9.37 |
11.22 |
0.9995 |
Y = 1.5X + 2.18 |
1.50 |
0.9993 |
| Dieldrin |
1.95-62.5 |
Y = 9.2X + 11.67 |
9.19 |
0.9986 |
Y = 1.2X + 2.37 |
1.22 |
0.9989 |
| Endrin |
1.95-62.5 |
Y = 8.3X + 3.35 |
8.30 |
0.9997 |
Y = 1.1X + 1.10 |
1.11 |
0.9996 |
| Endrin aldehyde |
1.95-62.5 |
Y = 7.6X + 2.88 |
7.61 |
0.9992 |
Y = 1.0X + 0.97 |
1.02 |
0.9998 |
| Methoxychlor |
1.95-62.5 |
Y = 8.8X + 11.11 |
8.87 |
0.9984 |
Y = 1.2X + 2.26 |
1.18 |
0.9988 |
| Endrin ketone | 7.81-62.5 | Y = 3.1X + 3.51 | 3.13 | 0.9992 | Y = 0.4X + 0.78 | 0.42 | 0.9998 |
*Y = Standard Area, C = standard Concentration ** Y = standard Area × internal standard concentration/internal standard area, C = Standard Concentration.