Extracting DNA information substances from blood is somewhat simpler than extracting DNA information substances from other carriers like bone, hair, or skin flakes.
Most of the substance in blood is water, and extracting genetic material involves stripping away other impurities, a process known as the purification of genetic material.
The purification of DNA substances varies slightly depending on the carrier.
Purifying genetic material from blood is the simplest, whereas extracting it from bone and other carriers requires slightly more complex purification substances.
The purification substances used by the Criminal Investigation Team are standardized compositions.
The type of purification material to use for different carriers is pre-defined.
Unless under extremely special circumstances, crime scene investigators are not allowed to mix their own purification substances for DNA extraction.
