So I have already depleted my bark with naphtha. And have done 2 pulls with toluene.
After pulling the toluene off I noticed an orange film sitting on top of the solution. This is my second extraction using Toluene and did not notice it the first time. Every naphtha pull remained the solution black.
My guess is that it's oils and fats that the toluene pulled from the plant matter but didn't pull it into the NPS so its just resting on top of the solution.
Thanks for your help and advice!
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