About 500 and 1,200 ppb of 4 ethylphenol have been found on two samples of sweet filtered substance, waiting to be re-fermented.
A case of Brettanomyces has been found on white passito wine (200 4EF and 200 4EG).
The laboratory can perform chemical analyses for the detection of 4EF and 4EG, microbiological analyses for pollution search.

The specific culture medium BIO DB agar (see link) , ready for use and made agaric, has been studied by Enologica Vason's Technical Department; it is a product available in sterile packages, among those that are assigned to microbiological analyses.