Sample Type

Equivalent concentration added (ppb)

Measurable concentration (ppb)

Mean Recovery (%+SD)

2,3,7,8 TCDF

2,3,4,7,8 PCDF

2,3,7,8 TCDF

2,3,4,7,8 PCDF

2,3,7,8 TCDF

2,3,4,7,8 PCDF

Milk

0.75

0.75

0.62

82 ± 0.17

83 ± 0.17

1.25

1.25

1.02

84 ± 0.14

82 ± 0.15

2.5

2.5

2.12

86 ± 0.12

85 ± 0.14

5

5

4.15

84 ± 0.11

83 ± 0.11