hi there

I want to prepare a NaCl/KCl saturated solution in water, adding a few drops in my bottle in order to resupply my body of lost salts from perspiration.
On the trail/bicycle ride I find it more practical than adding grains of salt to water. My concern is the long term potability: even a small amount of solution should last me weeks, so I'm asking if anyone knows for sure that a saturated NaCl solution will make microbiological growth impossible (bacteria, vira and such), or at least delay it for a very long time.

franco