If you are in PHC, which anticoagulant is used to sent the blood sample for blood glucose estimation?

Sodium fluoride- potassium oxalate mixture is used for glucose determination. NaF inhibits the glycolytic enzymes responsible for the breakdown of glucose in the blood ( At room temperature, about 10% of the glucose is lost per hour from an untreated sample). The potassium oxalate is the primary anticoagulant, as NaF has a poor anticoagulant effect.