We can subclassify these or these terpenoids and sesquiterpenoids in two different classes then comes the isolation of that Vinod said how we will isolate these terpenoids from the natural sources now due to their wide occurrence in nature all the terpenoids could know to be isolated and separated by a general method so we have to use very different kind of strategies different kind of methods for the different terpenoids however the mono and the sesquiterpenoids have a common source that is essential oils and therefore their isolation has been generalized this is carried out in the two steps as follows first we will isolate the essential Buy Terpenes oils from the natural sources then there will be a separation of terpenoids from these essential oils so first we will discuss about the isolation of essential oils as the plants having the essential oils generally poses maximum concentration at some particular time for example jasmine at sunset only it becomes desirable to take the plant part having the essential oils. At this particular time in general the several methods based on the different Prince principles have been developed for the extraction of oils from these plants the first method is the expression method in this method the plant material is first to cut into smaller pieces then these are crushed to get the juice which is screened to remove the larger particles after screening the juice is centrifuged into the centrifugal machine in a high-speed rate when one half of the oil is extracted and the rest half of the essential oil remains with the residue now from this True Terpenes residue inferior quality of the oil is obtained by distillation expression method is generally used to extract citrus lemon and the grass oils this method is not used these days then comes the steam distillation method this method is one most widely used method in this method the plant materials are macerated are again and then steam distilled to get the essential oils into the distillate. The distillate is then extracted by using the pure organic volatile solvents like light petroleum and the solvent is then removed by distillation under reduced pressure one should employ steam distillation method carefully because it suffers from the following demerits some essential oils undergoes decomposition during the steam distillation and some constituents of the essential oils for example the esters which are responsible for the order and the fragrance of the oil may undergo decomposition resulting into a perfume of inferior quality so there so this distillation should be done very carefully then comes the third method that is the Terpenes for sale extraction by means of the volatile solvents this method is generally used for such plants which ilton oil or which leads very low quantities of oil on steam distillation due to the decomposition of the essential oils in such cases the plant material is directly treated with the light patrol at 50 degree centigrade under these conditions the oil is taken up by the solvent along with the soluble coloring materials the essential oils from this extract are separated by removing the solvent by distillation under reduced pressure this method is widely used in the perfume industry then the another method is the adsorption method which is generally adsorbed on the fat on the fat content so it is also called as the and flourish method this method is basically employed in the France by this method.