<prompt> Which of the following is used for preservation of alcohol?Potassium acetateSodium sulphideSodium fluorideGlycerine  <response>: Sodium fluorideSodium fluoride is a useful preservative in a suspected case of alcohol poisoning.It is done with mixing 10 mL of blood with potassium oxalate sodium fluoride enzyme inhibitorsfor suspected alcohol poisoning.A preservative sodium fluoride, 0.5 -2 weight by volume should be added after collecting a vitreous humour sample for ethanol analysis in postmortem toxicology cases.Gastric contents can be stored in saturated salt solution. 