Table 4 External and internal calibration data for 18 target organochlorine pesticides

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