A GC analysis, properly

conducted and interpreted, should show what you need to know.

A problem in doing this (GC) might be "noise"

resulting from pheromones being almost like trace elements in a cologne, compared to the other ingredients.

Sometimes GC misses trace elements. It could be that DHEA was just much more plentiful than other chemicals. But

you'd think that Phil Stone would be the man to do it.

Nowadays GC is so commonplace, (every perfume company

has one) a person is an idiot to misrepresent the contents of his products.