by the different methods used and the high odour threshold values of both compounds.
As literature about alder buckthorn honey is absent, any links with previous researches could not be made. Also, it was not possible to highlight any compounds specific to raspberry or to alder buckthorn honeys.
Rape honey has been characterised by the presence of dimethyl disulphide (Radovic et al., 2001), which was not found during this study. Instead there was dimethyl trisulphide found in rape blossoms and in all honey samples except for alder buckthorn.
3.2. Clustering of honey samples
The data matrix was subjected with odour descriptions to hierarchical cluster analysis (HCA) based on dissimilarities. As seen from the Fig. 1, honey samples from the same botanical origins have clustered together. Heather honeys have the most similar flavour profiles. Raspberry honeys have similarities with rape