The Ontario Government has a method and limits.  Check the Food (Oenology) department at the University of Guelph.

Maria, when you write; "I want to dose in wine in various concentrations" do you mean that you  need to add the terpenes to wine at known concentrations, or that you need to measure the concentrations of terpenes in wine ?

I would have though that "dose" means "add", but the two answers so far address the measurement of concentration.

Thanks for your reaction! At first time I need to measure the C of terpenes in wine.