Whole blood collected for DNA typing purposes must be placed in a vacuum containing the preservative:

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EDTA (ethylene diamine tetra-acetic acid) is commonly used as a preservative in whole blood collected for DNA typing purposes. It helps to prevent the DNA from degradation and keeps the blood from clotting, thus preserving the DNA for later analysis. Rh factor is not a preservative and is a protein antigen found on the surface of red blood cells. CODIS stands for Combined DNA Index System and is a database of DNA profiles used for forensic purposes. Ethylene glycol is a toxic chemical used in antifreeze and is not used as a preservative for whole blood.

Whole Blood Collected for DNA Typing Purposes Must Be Placed