Geographical origin identification of propolis using GC-MS and electronic nose combined with principal component analysis

► DHS/GC-MS was applied for the determination of the volatile profile of propolis. ► The identification of the geographical origin of propolis was carried out. ► The propolis samples were discriminated by GC-MS coupled with PCA method. ► The propolis samples were discriminated by electronic nose coupled with PCA. ► GC-O was used to identify aroma-active components of propolis.