OK, good to know it doesn't go very far in...and needn't go very far to
get out.
..but it does adsorb.
Is there a difference between surface structure and the rest of the bottle
where a few centuries would make a difference. [a moot point in practical
terms ]
I found a 100 year old whisky bottle in a barn many years ago and barely
grazed it on something on the way out...it instantly turned to
dust. [Whoda thunkit]
Ode
At 04:09 PM 5/22/2010 -0700, you wrote:
Ode, What you seem to describe is a well known effect of surface
adsorption. It is true that glass and many other surfaces exhibit the
property of attracting and retaining organic molecules much in the same
way as charcoal and zeolites perform. However this is a surface phenomena
( several molecular layers thick) and it is far from "Glass isn't as
"waterproof" as we think it is and just like oil will migrate though cast
iron, various things will migrate through glass in either direction"
The permeability of glass is such that is used to contain the smallest
molecules (hydrogen) at high pressures. It is also used to hold high
vacuum values for years (forever, really) Glass is impermeable to any
common fluid. Hydrofluoric acid is the only compound that reacts
chemically with glass but nothing migrates through.
The difficulty in eliminating traces of any prior contents in glass can be
eliminated by using aqua regia a mixture of 3 parts of Hydrochloric and
one part of Nitric acids and allow to stand for a couple of hours and
rinse thoroughly with distilled water. If necessary the mixture can be
heated to 70-80C. Proceed with caution this blend is highly corrosive.
Cheers
Frank
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