Oils and Fats Analysis: 29thDGF Proficiency Test 2023
Organised by the German Society for Fat Science (DGF).
37 parameters can be tested this year.
Each laboratory may choose an individual set of parameters from the list below. The execution and the
evaluation of the laboratory proficiency test are carried out according to the internationally recognized
recommendations "Proficiency Testing of Laboratories" of Codex Alimentarius and ISO.
List of parameters:
Quality:
1. Acid value (Free Fatty Acids)
2. Peroxid value
3. Anisidine value
4. Di- and Polymerized Triacylglycerols Parameter of interest: Di-, tri- and oligomeric triacylglycerols =
Sum of dimeric, trimeric and oligomeric tricylglycerols
5. Total polar compounds
6. Tocopherols (alpha- Tocopherol, beta-Tocopherol, gamma- Tocopherol and delta- Tocopherol,
composition and amount)
7. Lovibond Colour Index (yellow and red)
8. CIELAB Colour Index
9. Gardner Colour Index
10. Phosphorus
11. Chromium
12. Copper
13. Iron
14. (NEW) Lead
15. (NEW) Nickel
16. Smoke point
17. Water (Karl Fischer)
Identity:
18. Iodine value
19. Saponification value
20. Butyric acid, quantitative
21. FAME composition
22. Triacylglycerol composition (GC-FID)
23. Sterol composition and amount
Olive oil and minor compounds:
24. Stigmastadiene
25. Alkyl esters (Methyl esters (C16 and C18) and Ethyl esters (C16 and C18))
26. Pyropheophytin A
27. Isomeric Diglycerides
28. K-Values (UV Absorption K232, K270)
Organic Contaminants
29. PAH (the most important four acc.to EFSA)
30. Mineral Oil Hydrocarbons
31. 2-/3-MCPD/Glycidol
32. Phthalates
33. Hexane Isomers, Benzene, Toluene, Ethylbenzene, Xylene
34. Antioxidants
Physical properties
35. Refractive Index (20 °C)
36. Density (20/20)
37. Rancimat (120 °C, 10 L/h)
Matrix
Sample A: vegetable oil mix
sample B: olive oil and sample
C: used deep-frying oil.
(150 g each, can be doubled on request)
Participation Fee:
400 Euro + VAT
(a reduced fee of 360 Euro applies for DGF corporate members).
Double amount of samples: add 60 Euro
Shipping of Samples:
add 5 Euro for Germany, 20 Euro for Europe and 40 Euro for World
Registration:
Deadlines:
Registration: 03.06.2023
Dispatch of samples: 01.07.2023
Deadline of reports: 31.10.2023
For further information please contact:
(Administration)
Deutsche Gesellschaft für Fettwissenschaft
P.O. Box 90 04 40, 60486 Frankfurt/Main, Germany
Phone +49 (0) 69- 7917 533, Fax +49 (0) 69- 7917 564
E-Mail amoneit@dgfett.de
or
(Scientific questions)
Dr. Ludger Brühl (DGF division "Analysis, Quality and Product Safety")
E-Mail: ludger.bruehl@mri.bund.de