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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