Hoses and neutral alcohol
- It's been quiet here so I'll post you a short story about hoses and
neutral alcohol. To say it short I was a sucker and trusted a
silicone hoses once again. This time I had a ventilation hose in my
rig that got periodically filled with cold 95.6% stuff. The ethanol
that came out sniffed quite neutral and even a quick blending test
showed no problems. Soo, I mixed a bottle of vodka from that stuff
and left it to blend for few weeks. Last weekend I decided it was
time for a nice G&T and used that bottle for mixing. The result was
odd tasting drink. After checking things I noticed that tonic was
good and the vodka had developed an offtaste during storage (in
glass bottle). Further checking revealed the whole 3 liter batch of
95.6% I had left was contaminated with same off taste. Now I started
thinking about this and the old brain finally produced a memory of
similar offtaste from the days I did my first ARC experiments -
again using silicone hoses in contact with 95.6% stuff. Yep, I had
been fooled again. I replaced that piece of hose with copper pipe
and ran the contaminated alcohol through again - resulting perfectly
neutral alcohol this time.
The moral of the story, do not trust any plastic hoses in contact
with 95.6% stuff. This silicone I was using was supposed to be food
grade stuff and everything. The funny thing is that the
offtaste "developed" while the alcohol was stored and was not
detectable immediately after distillation. So, use copper pipe, SS
funnel and appropriately placed bottle instead of those bloody
- What is this blending test you speak of ???????
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- Well, it's generally a good idea to dilute a sample down to 30-35% ABV
before sensory test. Flavors and offtastes will be more be more
detectable below 38% ABV as they are no longer masked by alcohol
fumes. Perhaps I should have talked about diluting - not blending
--- In email@example.com, Jason Davies <notrealy67@...>
> What is this blending test you speak of ???????