In fact, dehydration of the volatile oils of different samples according to common protocols is available in online and hard copy literature/sources. However, one of the simplest and easiest of methods is the use of certain amounts of sodium sulfate (Bihydrate) or calcium chloride (Bihydrate) in a specific amount
( from 0.5 to 1 g). Of course, It should be noted that, the volatile oil yield of essential oil should be considered.