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Glyphosate in flax seeds (P1304-RT)

In October 2013, PROOF-ACS organised and performed a ring test on glyphosate in flax seeds. 

Glyphosate is the active ingredient in the most frequently applied herbicides worldwide. Those herbicides are used to avoid undesirable plant growth. A recent European-wide study of the German BUND reported residues of glyphosate in humans. 

High amounts of glyphosate are used during cultivation of glyphosate-tolerant plants, like soy, rape and corn, especially in the US. Further glyphosate tolerant plants are under development (e.g. wheat).

Glyphosate tolerant flax is expected to access the market in 2015-2017. As a consequence, an increase in glyphosate residues in flax seeds is to be expected. 

Two test materials were provided. The test material consisted of
whole, non-crushed flax seeds:

  • One test material (150 g) was spiked with Glyphosate and trimethylsulfoniumiodide ("Trimesium").
  • The second test material (100 g) contained incurred residues
    of Glyphosate

Glyphosate-free blank material was provided upon request.
Trimesium was included as an add-on in this ring test. The participation for trimesium was not obligatory. 

The time schedule for the ring test was: 

  • Dispatch of samples:                                   21 October 2013
  • Sample entrance (in the laboratory):     22/23 October 2013
  • Deadline for results reporting:                 06 November 2013

Each participant was given a report after the evaluation of the analytical results. This report includes the anonymous results of all participants and the statistical evaluation of the results.

The participation fee was 650 EUR, blank material was available at a price of 70 EUR. Shipping costs were included.

Deadline for registration was 1 October 2013.