• Oils and Fats Analysis: 28thDGF Proficiency Test 2022

    Organised by the German Society for Fat Science (DGF).

    35 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. Saponification value
    3. Peroxid value
    4. Anisidine value
    5. Iodine value
    6. Di- and Polymerized Triacylglycerols Parameter of interest: Di-, tri- and oligomeric triacylglycerols = Sum of dimeric, trimeric and oligomeric tricylglycerols
    7. Total polar compounds
    8. Tocopherols (alpha- Tocopherol, beta-Tocopherol, gamma- Tocopherol and delta- Tocopherol, composition and amount)
    9. Lovibond Colour Index (yellow and red)
    10. CIELAB Colour Index
    11. Gardner Colour Index
    12. Water (Karl Fischer)
    13. Phosphorus
    14. Chromium
    15. Copper
    16. Iron
    17. Smoke point

    Identity:

    18. Butyric acid, quantitative
    19. FAME profile %
    20. Triacylglycerol profile % (GC-FID)
    21. Sterol profile and composition and amount

    Olive oil and minor compounds:

    22. Stigmastadiene
    23. Alkyl esters (Methyl esters (C16 and C18) and Ethyl esters (C16 and C18))
    24. Pyropheophytin A
    25. Isomeric Diglycerides
    26. K-Values (UV Absorption K232, K270)

    Contaminants

    27. PAH (the most important four acc.to EFSA)
    28. Mineral Oil Hydrocarbons
    29. 2-/3-MCPD/Glycidol
    30. Phthalates
    31. Hexane
    32. Antioxidants

    Physical properties

    33. Refractive Index (20 °C)
    34. Density (20/20)
    35. 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:

    Closed

    Deadlines:

    Registration: 03.06.2022
    Dispatch of samples: 01.07.2022
    Deadline of reports: 25.10.2022

    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