Skip to main content

Table 6 Results from participation in proficiency testing (PT) studies organized 2010–2017 for National Reference Laboratories (NRLs) and Official Laboratories (OFLs), covering 16 EU-regulated food samples and 4 feed samples (“feed”)

From: Rapid extraction of total lipids and lipophilic POPs from all EU-regulated foods of animal origin: Smedes’ method revisited and enhanced

Year–month

Organizera

Sample matrix

Number of participating labs

Assigned value, lipids (%)

Extracted lipids (%)

z-score

Assigned value (pg WHO-PCDD/F-PCB-TEQ/g)

Result (pg PCDD/F-PCB-BEQ/g)

Weight basis

z-score

CALUX cell line used

2010–05

RIKILT (NL)

Egg yolk (feed)

9

n/a

  

3.85

4.1

Fat

0.3

H1L6.1c3 mouse

 

RIKILT (NL)

Corn meal (feed)

9

n/a

  

2.36

2.9

wwb

1.1

H1L6.1c3 mouse

2010–07

EU-RL Dioxins

Pig fat

85

n/a

  

1.47

1.8

Fat

1.2

H4L1.1c4 rat

 

EU-RL Dioxins

Milk fat

85

n/a

  

6.96

6.4

Fat

− 0.4

H4L1.1c4 rat

2011–07

EU-RL Dioxins

Salmon filet

96

6.2

6.1

− 0.1

9.76

11.1

ww

0.7

H4L1.1c4 rat

 

EU-RL Dioxins

Fish oil

96

n/a

  

5.16

6.3

Fat

1.1

H4L1.1c4 rat

2012–02

EU-RL Dioxins

Lard

123

n/a

  

2.34

2.2

Fat

− 0.5

H4L1.1c4 rat

2012–09

EU-RL Dioxins

Whole egg 1

123

8.6

9.3

0.8

7.21

7.0

Fat

− 0.1

H1L6.1c3 mouse

 

EU-RL Dioxins

Egg yolk powder 1

93

55.8

61.5

1.0

4.26

4.5

Fat

0.3

H1L6.1c3 mouse

 

EU-RL Dioxins

Whole egg 2

93

8.7

9.1

0.9

0.65

0.62

Fat

− 0.4

H1L6.1c3 mouse

 

EU-RL Dioxins

Egg yolk powder 2

93

56.7

61.7

1.1

0.48

0.51

Fat

0.2

H1L6.1c3 mouse

2013–09

EU-RL Dioxins

Milk powder

93

23.1

22.5

 − 0.2

3.93

4.3

Fat

0.5

H1L6.1c3 mouse

 

EU-RL Dioxins

Milk fat

102

n/a

  

5.1

5.5

Fat

0.4

H4L1.1c4 rat

2014–09

EU-RL Dioxins

Cod liver

102

46.5

46.7

0.0

52.5

59

Fat

0.6

H4L1.1c4 rat

2015–09

EU-RL Dioxins

Olive oil

93

n/a

  

0.75

0.82

Fat

0.5

H4L7.5c2 rat

 

EU-RL Dioxins

Palm oil

96

n/a

  

1.27

1.3

Fat

− 0.1

H4L7.5c2 rat

2016–02

EU-RL Dioxins

Halibut filet

96

16.8

15.3

− 0.9

42.3

39

ww

− 0.3

H4L7.5c2 rat

 

EU-RL Dioxins

Fish oil

98

n/a

  

10.2

10

Fat

0.0

H4L7.5c2 rat

2016–09

EU-RL Dioxins

Dried basil (feed)

98

n/a

  

2.15

2.4

wwb

0.5

H4L7.5c2 rat

2017–02

EU-RL Dioxins

Palm fatty acid distillate (feed)

104

n/a

  

1.14

1.1

wwb

0.0

H4L7.5c2 rat

  1. Assigned values, results and z-scores for extracted lipids (where applicable) and for the sum of PCDD/Fs and DL-PCBs
  2. aRIKILT: RIKILT-Institute of Food Safety, Wageningen, NL; EU-RL Dioxins: EU-RL for Dioxins and PCBs in Feed and Food, Freiburg, DE
  3. b12% moisture content