Days after last spray

Residues of chlorpyriphos (mg∙kg⁻¹)

Dissipation (%)

R₁

R₂

R₃

Average

0

14.63

13.54

16.02

14.73

0.00

1

13.08

12.99

12.58

12.88

12.56

3

8.92

9.05

9.23

9.07

38.42

5

4.22

4.63

3.58

4.14

71.89

7

1.97

2.02

1.58

1.86

87.37

10

0.09

0.04

0.12

0.08

99.46

15

BDL

BDL

BDL

BDL

100.00

Soil (45th day)

BDL

BDL

BDL

BDL

-

Regression equation

Y = 4.419 + (−0.210) X

R²

0.882

Half-life (Days)

1.43

BDL: Below Determination Level (<0.05 mg∙kg⁻¹)