But salt is a dissolved solid, not a dissolved gas. Boiled water has the oxygen forced out of it by the heat, the same thing happens with the free chlorine.

Or, you can add ascobic acid (vitamin C), and give it a few minutes. There should be some nasty looking white flakes floating in your water- filter it, that preciptate (sp, it's early) is vitamin C bonding to the chlorine. Does the same thing with iodine. That's part of why I carry Emergen-C in my kits.