How to prepare 2mM phosphate buffer as Na2HPO4 and K2HPO4 added in a 4:1?

I'm trying to do an Intracellular Ca2+ mobilization assay and I need to add phosphate buffer as Na2HPO4 and K2HPO4 added in a 4:1? should I prepare 2mM of Na2HPO4 and 2mM of K2HPO4 separately then...

06 October 2020 5,639 2 View