Table 2

Evolution of Residual hexane contents in oil, meal and air.

In the nineteens 2020
Residual hexane in oil 400–500 ppm < 20 ppm
Residual hexane in meal 300–400 ppm < 250 ppm
Residual hexane in air (out of mineral oil system) 50/70 gr/m3 < 10–7 gr/m3

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