compounds

Spiked level (10 μg/kg)

Spiked level (50 μg/kg)

Spiked level (100 μg/kg)

Recovery (%)

R.S.D. (%)

Recovery (%)

R.S.D. (%)

Recovery (%)

R.S.D. (%)

PCB 28

95.2

4.21

101

3.78

93.2

3.26

PCB 52

92.8

3.58

92.8

3.97

98.3

2.68

PCB 101

96.5

5.06

95.2

4.66

95.1

4.01

PCB 118

98.1

4.32

98.4

6.32

90.9

3.82

PCB 153

94.6

3.77

97.8

4.21

102

3.21

PCB 138

93.4

2.58

96.2

3.35

99.3

2.12

PCB 180

98.9

3.05

96.6

3.12

98.5

2.44