# Quality Assessment of Honey Powders Obtained by High- and Low-Temperature Spray Drying
## 3 Results and Discussion
### Aroma Compounds
In all analyzed honeybee honey samples, the following twelve compounds were detected: octanoic acid, nonanoic acid, 2-methylpropanoic aid, octanal, nonanal, benzeacetaldehyde, butane-2,3-diol, 1-dodecanol, 2-(ethoxy)ethanol, propan-2-yl \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Group of Compounds** & **Compounds** & **HH-SD mg/100 g** & **HH-DASD** & **Feed Solution** \\  & **Solids** & **mg/100 g Solids** & **mg/100 g Solids** \\ \hline  & tridecan-3-one & 0.44 \(\pm\) 0.09 & nd & nd \\ \cline{2-4}  & 6-Methyl-5-hepten-2-one & 1.51 \(\pm\) 0.15 & nd & nd \\ \cline{2-4}  & 3,4-dimethylhexane-2-one & 4.42 \(\pm\) 1.64 & nd & nd \\ \cline{2-4}  & 3-(6,6-Dimethyl-5-oxohept-2-enyl)-cycloheptanone & 0.88 \(\pm\) 0.20 & nd & nd \\ \cline{2-4}  & 2,5-Dimethylbenzophenone & 3.93 \(\pm\) 0.11 & nd & nd \\ \cline{2-4} Ketones & 2(3H)-Furanone, dihydro- & 0.43 \(\pm\) 0.05 & nd & nd \\ \cline{2-4}  & 1,5,6,7- & & & \\  & tetrahydrocyclopenta[d][1,3]oxazine-2,4-dione & 0.32 \(\pm\) 0.07 & nd & nd \\ \cline{2-4}  & (5E)-6,10-dimethylundeca-5,9-dien-2-one & 3.31 \(\pm\) 0.10\({}^{\text{c}}\) & 1.43 \(\pm\) 0.18\({}^{\text{b}}\) & 0.81 \(\pm\) 0.12\({}^{\text{a}}\) \\ \cline{2-4}  & (1S,5R)-6,8-dioxabicyclo[3,2,1]oct-2-en-4-one & 1.64 \(\pm\) 0.28 & nd & nd \\ \cline{2-4}  & **Total ketones** & **16.88 \(\pm\) 1.35\({}^{\text{c}}\)** & **1.43 \(\pm\) 0.18\({}^{\text{b}}\)** & **0.81 \(\pm\) 0.12\({}^{\text{a}}\)** \\ \hline  & ether, heptyl hexyl & 1.32 \(\pm\) 0.14 & nd & nd \\ \cline{2-4}  & 1-iodotridecane & 1.22 \(\pm\) 0.17\({}^{\text{a}}\) & 1.10 \(\pm\) 0.14\({}^{\text{a}}\) & nd \\ \cline{2-4}  & diethylylene glycol monododecyl ether & nd & 2.97 \(\pm\) 0.27 & nd \\ \cline{2-4}  & oxime-, methoxy-phenyl- & 1.12 \(\pm\) 0.08\({}^{\text{a}}\) & 6.10 \(\pm\) 1.61\({}^{\text{c}}\) & 4.08 \(\pm\) 0.24\({}^{\text{b}}\) \\ \cline{2-4}  & dibutyl phthalate & 0.44 \(\pm\) 0.01\({}^{\text{a}}\) & 3.32 \(\pm\) 0.03\({}^{\text{b}}\) & nd \\ \cline{2-4}  & 2-formylhistamine & 27.80 \(\pm\) 1.77 & nd & nd \\ \cline{2-4} Other & ethane, 1,1’-oxybis[2-ethoxy-] & nd & nd & 0.50 \(\pm\) 0.21 \\ \cline{2-4}  & 2,4-pentadienenitrile & nd & nd & 0.38 \(\pm\) 0.20 \\ \cline{2-4}  & d-limonene & nd & nd & 2.07 \(\pm\) 0.53 \\ \cline{2-4}  & linalool oxide & nd & nd & 0.36 \(\pm\) 0.07 \\ \cline{2-4}  & bicyclol[2,2,1]heptan-2-ol, 1,7,7-trimethyl-, & & & \\  & exo- & nd & nd & 0.26 \(\pm\) 0.02 \\ \cline{2-4}  & **Total others** & **31.90 \(\pm\) 1.40\({}^{\text{c}}\)** & **13.49 \(\pm\) 2.06\({}^{\text{b}}\)** & **7.16 \(\pm\) 0.41\({}^{\text{a}}\)** \\ \hline
**Total** & & **181.25 \(\pm\) 20.78\({}^{\text{b}}\)** & **339.88 \(\pm\) 49.08\({}^{\text{b}}\)** & **85.59 \(\pm\) 2.80\({}^{\text{a}}\)** \\ \hline \hline \end{tabular}
\end{table} 
Table 3: \(Cont.\)tetradecanoate, methyl hexadecanoate, and oxime-methoxy-phenyl (Table 4). [PERSON] et al., 2014, characterized Slovakian honeydew honey aroma compounds and listed acetic acid, butane-2,3-diol, 3-hydroxy-2-butanone, and methyl ester of 2-hydrobenzoic acid as markers of honeydew honey samples [32]. In our investigation, acetic acid was also identified but only in feed solution samples and in reconstituted honeydew honey samples dehumidified with air spray drying (HH-DASD). Moreover, butane-2,3-diol was also reported in all samples of honeydew honey reconstituted from powders. [PERSON] et al., 2009, also described the volatile components of the honeydew honey aroma and some of them were identified in our honeydew samples, mostly in the feed solution; these were: 3-methyl-3-buten-1-ol, acetic acid, 2-methylpropanoic acid, 1-hexanol, butane-2,3-diol, phenylethanol, and D-limonene, linalool oxide [33]. [PERSON] et al., 2019, investigated the aroma profile of honeydew honey. In the group of aldehydes, they identified: octanal, nonanal, and decanal, and their content was 0.032, 0.14, and 0.19 mg/100 g of solids, respectively.