Final answer:
EDTA is not a preferred anticoagulant for plasma chemistry samples because it interferes with clotting factors.
Step-by-step explanation:
EDTA (ethylene diamine tetraacetic acid) is not a preferred anticoagulant for plasma chemistry samples because it interferes with clotting factors. EDTA works by chelating, or binding to, calcium ions, which are essential for the activation of clotting factors. When EDTA is present, the clotting factors cannot function properly, leading to impaired blood coagulation.