The anticoagulant of choice for glucose testing when analysis is not performed promptly is:

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Sodium fluoride prevents glycolysis,or the breakdown of glucose,in the blood sample.Without this anticoagulant,if not tested promptly,the blood glucose will decrease with time,resulting in a falsely low glucose level.The other anticoagulants listed do not prevent glycolysis and are unacceptable.Glycolysis will also continue to occur in samples collected with no anticoagulant,if the serum is not separated from the cells following phlebotomy.

The Anticoagulant of Choice for Glucose Testing When Analysis Is