Can a DNA profile be extracted from a sperm sample that's a week old but mixed with human yolk test buffer?

See my remark. Dna can be extracted from sperm,( but mixed with yolk buffer ????? who has mixed one with the other? a lab.? I hate to venture an answer,it would behooves you to inquire from a genetic lab.I don't know where you live, to save you expenses,call the N.I.H,genetic division.