Table 2 Probit analysis to determine the lethal dose (LD 50) of various EMS concentrations exposed at 2Â h, 4Â h 6Â h, and 8Â h based on mortality rate in Choy Sum
Corrected mortality | Concentration (%) | Log Dose | Observed mortality | Empirical Probits | LC50 (%) [Min -Max] | Slope | Intercept | Chi-Square (df = 4) |
|---|---|---|---|---|---|---|---|---|
2 h | 0 | 0.00 | 0 | 0 | 17.29 (5.74—52.03) | 0.995 | 3.768 | 0.04 |
0.1 | -1.00 | 2 | 2.95 | |||||
0.3 | -0.52 | 3 | 3.12 | |||||
0.5 | -0.30 | 4 | 3.25 | |||||
1 | 0.00 | 8 | 0.00 | |||||
1.5 | 0.18 | 10 | 3.72 | |||||
2 | 0.30 | 29 | 4.45 | |||||
4 h | 0 | 0.00 | 0 | 0.00 | 1.55 (0.96—2.51) | 1.759 | 4.663 | 0.678* |
0.1 | -1.00 | 2 | 2.95 | |||||
0.3 | -0.52 | 13 | 3.87 | |||||
0.5 | -0.30 | 14 | 3.92 | |||||
1 | 0.00 | 33 | 0.00 | |||||
1.5 | 0.18 | 48 | 4.95 | |||||
2 | 0.30 | 64 | 5.36 | |||||
6 h | 0 | 0.00 | 0 | 0.00 | 0.97 (0.62—1.50) | 1.86 | 5.070 | 0.164* |
0.1 | -1.00 | 3 | 3.12 | |||||
0.3 | -0.52 | 26 | 4.36 | |||||
0.5 | -0.30 | 35 | 4.61 | |||||
1 | 0.00 | 38 | 0.00 | |||||
1.5 | 0.18 | 52 | 5.05 | |||||
2 | 0.30 | 86 | 6.08 | |||||
8 h | 0 | 0.00 | 0 | 0.00 | 0.54 (0.36—0.84) | 1.93 | 5.533 | 0.766* |
0.1 | -1.00 | 7 | 3.52 | |||||
0.3 | -0.52 | 36 | 4.64 | |||||
0.5 | -0.30 | 52 | 5.05 | |||||
1 | 0.00 | 64 | 0.00 | |||||
1.5 | 0.18 | 82 | 5.92 | |||||
2 | 0.00 | 100 | 0.00 |