Purity analysis consists of seperating a sample into 3 distinct fractions :
- pure seed (from the desired species)
- inert matter (plant debris, dirt, stones…)
- seed from other species (weed species, other cultivated species…)
The test is run on a sample of around 2500 seeds, in accorandance with the International seed testing association guidelines (ISTA). Each fraction is then weighed and the results are given as a percentage of the initial weight of the sample.
All other identified species are given in the test report.
Other related tests and services
This type of analysis is often carried out as part of full analyses on raw seed samples, but can also be requested in connection with quality assessment of seed stocks, of purchased seed batches or of seed batches from experimental plots.
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