In the present study, the odor active compounds of pig blood have been reported f or the first time. In total, 28 different odor active compounds have been identified by HRGC-O coupled with 2D-HRGC-MS. Most of the volatile components present in pig blood extract appeared to be from different metabolic and reaction pathways in the different tissues of the body. Although the most potent odor active compound was not identified, the odor quality was found to be fleshy. The unknown compound 17 with fleshy odor could be further identified and more research on the volatile constituents of blood from other animals could be done to asses any difference in the odor active constituents or in the quantity of odor active compounds.
         All the substances identified in the present study were detected by human olfactory perception after concentration of the sample. To determine the influence of the individual substance on the overall odor impression, it would be necessary to quantify the substances and then to compare the calculated amounts of these substances to determine the odor threshold for the species under investigation. The quantified odor active compounds could be tested on a given species to asses any behavioral changes to these potent odorants which would allow for the development of more effective chemical repellents.