Conc.mg/l

log conc.

mortality in hours

cumulative

mortality%

survival%

probit

24

48

72

96

Mortality

0.00

0.000

0

0

0

0

0

0

0

0

50.00

1.699

4

1

0

1

6

60

40

5.2533

100.00

2.000

3

0

4

0

7

70

30

5.5244

150.00

2.176

2

2

0

1

5

50

50

5.0000

200.00

2.301

4

1

0

0

5

50

50

5.0000

250.00

2.398

4

3

0

1

80

20

5.8416