soxhlet extraction has many special apparatus more than simple extraction such as porous container (thimble). The solid sample was placed into the thimble and can be extracted continuously by solvent flow in soxhlet apparatus. The advantage of this system is that instead of many portions of warm solvent being passed through the sample, just one batch of solvent is recycled. This technique is particularly useful in cases when the pure compound is partially soluble in a solvent and the impurity is not soluble in that solvent and it is suitable for the sample that usually easily decomposition. The soxhlet apparatus is show in Figure1