in my research for other things i came across Dried blood.
link:
http://en.wikipedia.org/wiki/Blood_plasma| QUOTE |
| dried plasma package came in two tin cans containing 400 cc bottles. One bottle contained enough distilled water to completely reconstitute the dried plasma contained within the other bottle. In about three minutes, the plasma would be ready to use and could stay fresh for around four hours.[4] |
my question is would a vampire be able to live off it for any amount of time? if so how long?
It probably depends on if your vampire can survive on dead blood or not. Most (I think) can't, but some can. Some it doesn't do anything for either way.