Adjusting pH when percentage of an ingredient has to stay constant
I’m an aspiring formulator and I have a newbie question about adjusting pH. At the moment I’m experimenting with various thickeners (e.g. Xanthan Gum, Karaya Gum, Magnesium Aluminium Silicate …) and I’d like to compare the viscosities of different thickeners at a certain percentage (e.g. viscosity of 1% Xanthan Gum in water vs viscosity 1% smectite in water).
How should I go about adjusting pH at the end? As pH adjusters change the formula and the percentage of existing ingredients in the product, is there a way to calculate how much (e.g.) citric acid I need so that percentage of thickeners doesn’t change?
Thank you so much!!
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