Evaluation of Olive and Date-plum Tree Heartwoods’ Essentials Oils’ in Cologne Production and Determination of Consumer Attitudes

In this study, the possibilities of evaluation of olive (Olea europaea L.) and date-plum tree (Diospyros lotus L.) heartwoods essential oils in cologne production were investigated and the effects of the obtained odors on consumers were tried to be determined with the help of survey study. For this purpose, essential oils of olive and date-plum tree heartwood were first obtained and the essential oil of the orange peel has been utilized as support scent. Later, 5 different colognes which contain 70% ethanol (70°) were produced using these essential oils. According to the used volumetric proportions of the essential oils, the colognes were coded as follows, 1: 100% olive tree heartwood essential oil (OTEO), 2: 100% date-plum tree heartwood essential oil (DPEO), 3: 50% OTEO + 50% DPEO, 4: 66.6% OTEO + 33.3% orange peel essential oil (OEO), 5: 66.6% DPEO, and 33.3% OEO. The produced colognes were tested on some students of the Department of Forest Industrial Engineering at Karadeniz Technical University.The students were asked some survey questions to determine their odor culture and the likelihood of tested colognes. The Statistical Package for the Social Sciences (SPSS 21.0) package program was used to evaluate the survey questions. It was found that 92% of the participants used cologne and 56% of this group used the cologne several times a week.The most favored cologne among the produced colognes was cologne No. 5 (66.6% DPEO + 33.3% OEO combination). It has also been found that the cologne which produced by using mixed half of the date-plum tree heartwood essential oil and olive tree heartwood essential oil is more favored than the cologne produced by using these essential oil alone