Here are samples form my first whole batch water wash. I think I said previously, although they seem to prove the point, the method was rather unusual in that I didn't let the residual glycerol drop out in the settling tank. I did everything which I believe promotes HMPEs and sure enough they appeared in the settling tank in quite large quantities.
The un-washed sample was taken and then the whole lot residual glycerol, HMPEs and any remaining Methanol was water washed. This I suppose at least indicates that even once they've formed, it would seem that HMPEs can be dealt with by water washing (although the washed bio was not as clear as I would have wished for).
The samples have been outside for about three weeks ...
The un-washed sample on the right had to be swirled a bit to stir up the HMPEs which were well settled in the bottom of the jar.
Keith, note the difference in colours.
