I have kind of a "naive" question for the experts! Please don't slam me!

If an hgh prep was laced with IGF-1 how much could that influence the blood IGF-1 levels on testing? I guess the imbedded question is how much IGF-1 would you have to inject to get 500 - 600 ngs/ml in your blood an hour later? Is that even possible? Do the guys who inject the peptides have blood work done?
Also, a related question: does anybody know if there is a lab that will do mass spec on hgh preps to confirm purity, identity, contaminants, etc.? Could you pm me the info? If not,
maybe I will start my own hgh analytical analysis business!? 
Any interested partners?
Thanks, Lifeforce