Science and Education Publishing World Journal of Analytical Chemistry 2333-1283 3 1 2015 11 16 Variation in Essential Oil Constituents of the Leaf of Anacardium Occidentale found in Ondo, South Western-Nigeria 10 16 EN Jesumoroti Omobolanle Janet Oderinlo Ogunyemi Olajide Oluwafemi Kola Augustus Department of Chemistry, Adekunle Ajasin University, Akungba-Akoko, Nigeria Olagbadegun Oluwakemi Janet WJAC2015312 10.12691/wjac-3-1-2 2015 6 19 2015 9 11 2015 11 14 GC-MS analysis of the essential oil from the fresh leaves of Anacardium occidentale from Nigeria detected sixty components. The essential oil was hydro-distilled by using Clevenger-type apparatus. The main constituents in the essential oil from the leaves were beta-caryophyllene (17.36 %), alpha-copane (13.50 %), germacrene D. (10.67 %), germacrene B (9.93 %) and gamma-cadinene (8.17 %).