[pct-l] water treatment

[Brian McLaughlin]

> The secret to using iodine is to sprinkle a tiny 
> bit of ascorbic acid powder (vitamin C) into the 
> water after the treatment period.  This amazing 
> stuff takes all the iodine color tinge AND the 
> taste out of the water.

According to people who know a bit of chemistry,
the ascorbic acid bonds with the iodine to form
iodide, a new compound that is more inert and 
less volatile.