<prompt> Anticoagulant used to estimate glucose from a sample sent from PHC isEDTACalcium oxalatePotassium oxalate NaFSodium citrate  <response>: Ans. is c i.e. Potassium oxalate NaF Repeat from Nov 06The standard anticoagulant used for collection of blood sample for glucose estimation is potassium oxalate.Sodium fluoride is used as a glycolytic inhibitor At room temperature a loss of 1 to 2 of glucose per hour is expected in the collected blood sample as the RBCs in the sample are still alive and extracting glucose for glycolysis. This gives a false low value of blood glucose. Sodium fluoride is added to inhibit glycolysis 