We have been trying to make our own terps in house with a CO2 machine. We sourced 5 pounds of lavender and did a terp run. After we sent it in for testing and it failed for ethanol, acetone and heptane. The ethanol could make a little sense if it was residual left over from our cleans runs but we don’t have any acetone in our lab. So I’m wondering if it could be because these solvents were present on the lavender that we bought? Or is this somehow a byproduct of the extraction? I’m also wondering if there is a way to remove the solvents with out oxidizing or damaging the terpenes?
Any input or advice would be greatly appreciated