Question

who created the mcilvaine buffer system?

Answer 1

I guess the last name is Mcilvaine but I couldn't find the other names. However, I found this reference to Journal Biol Chemistry in 1921. Here it is with chemical abstracts number.
J Biol Chem 1921, 49, 183. Chem Abs 16-729). You can look up that information at that reference.