Can blood toxicology done on embalmed body?

There could be some problems. as I understand it, when a human body is embalmed- this is embalming, not damage-control restoration. all of the blood is drained and pumped out- and indeed certain physical organs may be removed alsoi ( not for recycling- but for other reasons- possibly odor control) then the embalming fluids are pumped in- about the same volume as a normal person"s circulatory capacity- 6 quarts. obviously you can do examinations of say- well bullet holes or exit wounds- but if the blood is removed- there would be problems with blood tests!