1) You can store dry powder in frig as well as mixed IGF. Just pull 1cc out of the AA vial and mix it with the IGF. The concentration will be 1000mcg/ml.
2) 1ml is going to be 1000mcg. That means 10 on a insulin syringe will be 100mcg. If you want 40mcg you'll have to draw to the fourth tick on the syringe. If you draw to 5 it'll be 50mcg.