chemical

manufacturer

purity

spike level/ (mg/kg)

assigned analyte group

2,4’-DDT

LGC

99.8%

7.07

DDX

4,4’-DDD

LGC

99.0%

8.38

4,4’-DDE

Fluka

Pestanal

5.38

4,4’-DDT

Riedel de Haen

99.0%

10.28

methoxychlor

Fluka

Pestanal

4.91

aldrin

LGC

97.0%

3.17

dieldrin

LGC

98.4%

2.54

α-endosulfan (α-ES)

Riedel de Haen

99.0%

6.40

hexachlorobenzene (HCB)

Riedel de Haen

99.0%

5.89

α-hexachlorocyclohexane (α-HCH)

Riedel de Haen

98.0%

2.60

HCH

β-hexachlorocyclohexane (β-HCH)

Riedel de Haen

98.4%

1.74

γ-hexachlorocyclohexane (γ-HCH)

LGC

99.9%

3.98

PCB 28

LGC

99.0%

0.28

PCB

PCB 52

LGC

99.5%

0.23

PCB 101

LGC

99.0%

0.42

PCB 118

LGC

99.5%

0.38

PCB 138

LGC

98.5%

0.24

PCB 153

LGC

99.0%

0.17

PCB 180

LGC

99.0%

0.27