We, a group of undergraduate students, were interested in what and how much fragrance chemicals were involved in commercial cosmetic products such as shampoos and hand creams. For characterization and quantification of chemical compounds in the products, we employed GC-MS analysis. We first surveyed volatile chemicals arising from the products using the headspace sampling method. As a result, we could characterize various fragrances including limonene, linalool, and eucalyptol, which are contained in the commercial products. To quantify the detected fragrances, we did literature study and prepared our own protocols for the experiments. Using the protocols we prepared, we carried out extraction of fragrance chemicals and purified them using silica columns. The samples were then subject to quantification by GC-MS using the standard addition method, of which levels were determined to be about ~ nl/g. In this study, we could learn how to plan and peroform an experiment that would answer our research question as well.