What acid is best for extraction?

[Johnbip]

There are some advantages of citric acid. I assume it won't evaporate as it's usually a solid, hence no shift in PH with a lot of boiling.

I am beginner in extraction. justr did 2. I am using vinegar, and i do long double boil. My yield has not been so great, for 100g of MHRB, I got 0.8g of crystal. (when I see the other post people manage to collect 1.6 up to 2g) Do you think if I use citric acid i might have more yield? (I din't know that vinegar lose acidity during boiling)