Abstract: In this thesis, we studied the preparation of clove oil microcapsule by complex coacervation procedure using gelatin and gum arabic were used as wall material and clove oil for the core material, respectively. And the aim of the studies was mainly to approach the main effecting factors and suitable process. And the method of mensurating content of Eugenol was established. The results showed that the average particle size of clove oil microcapsule is 16 μm and it coating efficiency is 82.4%.Method of UV-vis spectrophotometry was established to determine content of Eugenol in the clove oil microcapsule. The standard curve equation is A=0.0171C +0.0014 (r=0.9994) in the concentration range of 1mg/ml to 10 μg/ml with its recovery rate of 98. 70%, and the method was extremely steady. Method of UVvis spectrophotometry established could be used to determine Eugenol in the clove oil microcapsule.

Key words: clove oil; microcapsule; complex coagulation process; UV-vis spectrophotometry; content measure