does anyone knows about soft drinks syrup pH before and after adding sugar?
Which soft drink?
it depends on your recipe.
Give us more details.
With Ph of each drink, flavour tonality or type and Acid/Brix ratio is also important as well as if system requires a buffering system to protect or become part of the beverage system for taste.The Ph before and the Ph of RTD is a relation depending on the diluting ratio.