# Quality Assessment of Honey Powders Obtained by High- and Low-Temperature Spray Drying
## 3 Results and Discussion
### Aroma Compounds
\begin{table}
\begin{tabular}{c c c c c} \hline
**Group of** & **Compounds** & **HH-SD mg/100 g** & **HH-DASD** & **Feed Solution** \\
**Compounds** & **Solids** & **mg/100 g Solids** & **mg/100 g Solids** \\ \hline  & propan-2-yl tetradecanoate & 0.83 \(\pm\) 0.16 b ** & 2.20 \(\pm\) 0.07 c  & 0.31 \(\pm\) 0.18 a  \\ \hline methyl 9-oxononanoate & 0.71 \(\pm\) 0.08 a  & 2.31 \(\pm\) 0.50 c  & nd \\ \hline Isopropyl Palmitate & 0.44 \(\pm\) 0.02 & nd & nd \\ \hline methyl hexadecanoate & 0.47 \(\pm\) 0.12 a  & 14.47 \(\pm\) 3.12 c  & 1.25 \(\pm\) 0.55 a  \\ \hline Dodecanoic acid, & & & & \\
2-(acetyloxy)-1-[(acetyloxy)methyl]ethyl & 1.31 \(\pm\) 0.11 & nd & nd \\ ester & & & & \\ \hline Dodecanoic acid, 1-methylethyl ester & 0.81 \(\pm\) 0.16 & nd & nd \\ \hline Acetic acid, heptyl ester & 0.89 \(\pm\) 0.25 a  & 3.51 \(\pm\) 0.37 b  & nd \\ \hline
2-methylpropanoic acid, & & & & \\
3-hydroxy-2,4,4-trimethylpentyl ester & 0.47 \(\pm\) 0.16 & nd & nd \\ \hline
[(E)-4-formyloxybut-2-enyl] formate & 2.90 \(\pm\) 0.37 & nd & nd \\ \hline butyl hexanoate & nd & 1.72 \(\pm\) 0.22 & nd \\ \hline Glycine, N-[4-[(trimethylsilyl)oxy]benzoyl]-, methyl ester & nd & 1.41 \(\pm\) 0.37 b  & 0.67 \(\pm\) 0.05 a  \\ \hline Tridecanoic acid, 4,8,12-trimethyl-, methyl ester & nd & 1.64 \(\pm\) 0.25 & nd \\ \hline methyl dodecanoate & nd & 7.08 \(\pm\) 0.13 b  & 0.66 \(\pm\) 0.33 a  \\ \hline
[2,2,4-trimethyl-3-(2-methylpropanoyl)]pentyl] & nd & 1.02 \(\pm\) 0.11 & nd \\
2-methylpropanoate & & & & \\ \hline Tetradecanoic acid, methyl ester & nd & 8.47 \(\pm\) 1.68 b  & 0.75 \(\pm\) 0.37 a  \\ \hline Pentadecanoic acid, methyl ester & nd & 0.98 \(\pm\) 0.07  & nd \\ \hline
14-Pentadecynoic acid, methyl ester & nd & 0.98 \(\pm\) 0.07 b  & 0.27 \(\pm\) 0.08 a  \\ \hline Octadecanoic acid, methyl ester & nd & 2.73 \(\pm\) 0.45 & nd \\ \hline methyl (E)-octadec-9-enoate & nd & 5.33 \(\pm\) 1.00 b  & 0.31 \(\pm\) 0.06 a  \\ \hline Disobutyl phthalate & nd & 6.04 \(\pm\) 0.15 & nd \\ \hline Nonanedio acid, dimethyl ester & nd & 7.84 \(\pm\) 2.52 & nd \\ \hline methyl dodecanoate & nd & nd & 1.13 \(\pm\) 1.23 \\ \hline Pentanoic acid, 2-hydroxy-, methyl ester & nd & nd & 0.33 \(\pm\) 0.09 \\ \hline
**Total esters** & **4.94 \(\pm\) 0.34 a**  & **63.41 \(\pm\) 4.82 c**  & **35.94 \(\pm\) 5.28 b  \\ \hline Tetradecane & 0.60 \(\pm\) 0.10 & nd & nd \\ \hline Hexatriacontane & 1.62 \(\pm\) 0.25 & nd & nd \\ \hline
[(E)-3,3-dimethoxyyprop-1 enyl]benzene & nd & 0.89 \(\pm\) 0.05 & nd \\ \hline
1,1,6,6-tetramethylcyclodecane & nd & 3.06 \(\pm\) 0.78 & nd \\ \hline
1-butyl-2-pentylcyclopropane & nd & 1.59 \(\pm\) 0.25 & nd \\ \hline Heneicosane & nd & 1.92 \(\pm\) 0.33 & nd \\ \hline Tricosane & nd & 1.85 \(\pm\) 0.20 & nd \\ \hline Eicosane & nd & Nd & 0.16 \(\pm\) 0.03 a  \\ \hline
**Total hydrocarbons** & **2.22 \(\pm\) 0.35 b ** & **9.31 \(\pm\) 1.62 c** ** & **0.16 \(\pm\) 0.03 a ** \\ \hline \end{tabular}
\end{table} 
Table 3: _Cont._In all analyzed rapeseed samples, the following four compounds were detected: nonanal, bezaldehyde, 2-methylbutyl 2-methylbutanoate, and methyl hexadecanoate (Table 3). Nonanal is known as an aroma compound found in kinds of honey, which gives citrus, fatty, floral green, and spiny odor [30]. Another volatile component of rapeseed honey aroma as benzaldehyde, which contributes to the formation of sweetness and almond aroma of the honey [30]. In our previous studies, we discussed the aroma profile of reconstituted rapeseed honey powders obtained due to low-temperature spray drying with dehumidified air [13]. The most abundant aroma compounds in those profiles were also nonanal, benzaldehyde, furufural, acetic acid, phenylmethanol. [PERSON] et al., 2011 described the aroma compounds present in rapeseed honey and other kinds of honey [31]. It was reported that the highest peak belonged to benzoic acid and benzoic alcohol (phenylmethanol) [31]. These components were also found in our studies; benzoic acid was found in RH-DASD and feed solution samples and phenylmethanol only in the feed solution.