What chemicals can extend the shelf life of a carbonated drink?

Question

If one were to create a carbonated drink, what would be some chemicals to add to extend the shelf life of such a drink?

Answer 1

first its buffered to stay in the pH range that won't eat your teeth as fast. also it's got loads of preservatives from sodium benzoate to EDTA to help keep ions etc. in check

Answer 2

Addition of preservatives can extend the shelf life of a carbonated drink. Typical preservatives are Sulphur dioxide, Benzoic Acid, Sorbic Acid, Dimethyl Dicarbonate.

Answer 3

Anything that increases the surface tension of the liquid. Alka-Seltzer decreases surface tension, which is why you get a shower when you put one in a can of pepsi. You can also try adding another acid, like lemon juice, so the equilibrium shifts to favour carbon dioxide instead of carbonic acid.

Answer 4

You don't need chemicals. You just need to keep them in room temperature, or below 77F and don't let the carbonation escape. THAT'S for CARBONATED drinks. The OTHERS have to be kept REFRIGERATED! The NON carb drinks DO have chemicals to help preserve them, IN them.

Answer 5

Buffers to stablilize the pH. For example, phosphoric acid can act as an acidic buffer, and is found in most soft drinks.