## 3 Results and Discussion
From those, benzeneacetaldehyde (C64), benzaldehyde (C40), and furan, 2,5-diethyltetrahydro dro (C33) are common honey constituents; however, they were found in significantly higher percentages in thyme honey compared with the other examined monofforal honey types. Benzeneacetaldehyde (C64) and benzaldehyde (C40) were also abundant in thyme honey samples analyzed in other studies [6,87,88]. The compounds methyl butanal isomer (C1), cyclopentane, 1,3-dimethyl-isomer (C2), heptane (C3), methyl isobutyl ketone (C11), disulfide, dimethyl (C12), toluene (C16), 1-octene (C20), octane (C21), furfural (C22), p-xylene (C28), furan, 2,5-diethyltetrahydro-(C33), nonane (C34), benzaldehyde (C40), benzene, 1,3,5-trimethyl-(C48), octanal (C53), benzene, 1-methyl-4-(1-methylethyl)]-[p-Cymene] (C61), benzeneacetaldehyde (C64), benzene, 1-methyl-4-(1-methylethyl)-(C75), nonanal (C80), decanal (C104), furan, 3-phenyl-(C106), and naphthalene, 1,2-dihydro-1,1,6-trimethyl-(C117) were found in all the examined thyme honey samples, i.e., in 100%. The concentration of p-cymene (C61) was three times higher in thyme honey than in the other analyzed honey types, in contrast to the study of [PERSON] et al. [6], who did not detect the compound in thyme, but did in eucalyptus honeys. Additionally, benzyl nitrile (C84) and furan, 3-phenyl-(C106) seemed to be characteristic for thyme honey, because in the other honey types, they were not detected or found in percentages below 0.2%. In case of erica honey, the compounds at the greatest concentrations were furfural (C22), toluene (C16), isophorone (C81), octane (C21), and decanal (C104) (21.72%, 12.69%, 10.62%, 7.16%, and 3.41%, respectively), whereas isophorone (C81) and furfural (C22) seemed to stand out in erica honeys, compared with the other studied honey types. The significant content of isophorone is also reported by [PERSON] et al. [1], and that of furfural by [PERSON] et al. [31]. The compounds methyl butanal (isomer) (C1), cyclopentane, 1,3-dimethyl-(isomer) (C2), heptane (C3), 1-pentanol (C7), methyl isobutyl ketone (C11), disulfide dimethyl (C12), toluene (C16), 1-octene (C20), octane (C21), furfural (C22), p-xylene (C28), nonane (C34), ethanone, 1-(2-furanyl)-(C36), alpha-pinene (C38), benzaldehyde (C40), benzene, 1,3,5-trimethyl-(C48), benzene, 1,2,4-trimethyl-(C59), benzeneacetaldehyde (C64), benzene, 1-ethyl-2,3-dimethyl-(C67), nonanal (C80), 4-ketoisophorone (C85), methyl salicate (C100), safranal (C101), decanal (C104), naphthalene, 1,2-dihydro-1,1,6-trimethyl-(C117), and damascenone, trans-(C119) were found in 100% of all the examined erica honey samples, with 4-ketoisophorone (C85) found only in erica honey. Ethanone, 1-(2-furanyl)-(C36), safranal (C101) and decanal (C104) were detected in significantly higher percentages in erica honey compared with the other studied monofforal honey types. [PERSON] et al. [89] suggested the presence of degraded carotenoids (3,5,5-trimethyl-cyclohex-2-enederativatives) as characteristic of heather honey (Ericaceae family), compounds also found in the present study, in contrast to [PERSON] et al. [1], who identified an absence of these compounds from heather honey. Probably, the different geographical origin contributes to the variations of erica volatile profile, indicating the need for further research regarding the Ericaceae honey. Furthermore, the compounds 1-octene (C20), octane (C21), toluene (C16), nonanal (C80), and alpha-pinene (C38) were detected in higher concentrations in honeybee honey (pine, fir) compared with blossom honeys, in percentages 21.54%, 14.25%, 7.97%, and 3.78%, respectively, for pine honeys, and in percentages 20.91%, 16.31%, 8.49%, and 1.43%, respectively, for fir honeys.