ISO Question

So, I have been making ISO for a few weeks now and it has been my preferred method. Although, I have a question, how can we be sure we are getting all of the ISO out without some sort of purging method other than double boiling or air drying? Does ISO not get trapped like butane? Any insight would be appreciated.

It is easy to tell by taste, whether the Iso is purged below sensory threshold, which is significantly lower than Permissible Exposure Limits.

The easiest way to purge without vacuum, is with heat and a very thin film. We typically use 140F for shatter and 250F for decarboxylated.

Well I definitely cannot taste it in any batch . I must be doing something right. Thanks for the reply!