Hope this thread helps.
http://www.anasci.org/vB/showthread.php?t=3438
The way I do mine is break the top of the bacteriostatic water amp off. Draw the 1ml of water out of it. Break the top of the powder amp off. Shoot the 1ml of water into the amp and swirl around a bit. The powder will disolve immediatley. Draw all the solution out In a syringe (Must be atleast a 5ml syringe. I use a 25 gauge pin). Change pins and draw out 4ml more of bacteriostatic water. Shoot solution into a sterile vial. YOU MUST REFRIDGERATE!!!!!!!!!!!!!!!!!!! I have always been told that as long as it stays in the fridge, HCG will last up to 60 days, no longer.
****This solution with a 5000IU kit and 5ml total of bacteriostatic water
will give you 500 IU's per 1/2 ml.