## 2 Results and Discussion  
### Volatile Composition of Red Mombin Pulp  
In this work the HS-SPME technique was used as a tool to assess the quality and stability of red mombin pulp and the powder produced by SD. The use of HS-SPME and subsequent analysis by gas chromatography coupled with mass spectrometry (GC-MS) was able to detect a total of 36 volatile compounds in the headspace of mombim pulp samples, 17 (47.2%) of which have been reported for the first time in this fruit. Thirty-four (94.4%) compounds were identified (Table 1), mostly terpenes (11), followed by alcohols (nine), alkanes (five), esters (five) and ketones (two). \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Peak**} & \multirow{2}{*}{**Compound**} & \multirow{2}{*}{**RI**} & \multirow{2}{*}{
\begin{tabular}{c} **Integral** \\ **pulp** \\ \end{tabular} } & \multicolumn{4}{c}{**Powerder**} \\ \cline{4-9}  & & & & **After SD** & **PP** & & **LP** \\ \hline
1 & hexane * & \(>\)700 & 10.7 \(\pm\) 1.3 & 1.2 \(\pm\) 0.1 & 1.6 \(\pm\) 0.3 & 1.1 \(\pm\) 0.3 & 1.6 \(\pm\) 0.5 & 1.3 \(\pm\) 0.4 \\
2 & ethyl acetate * & \(>\)700 & 107.5 \(\pm\) 8.4 & nd & nd & nd & nd & nd \\
3 & 2,3-pentanedione * & \(>\)700 & 41.6 \(\pm\) 4.3 & nd & nd & nd & nd \\
4 & 3,3-dimethyl pentane * & \(>\)700 & 11.17 \(\pm\) 0.47 & nd & nd & nd & nd \\
5 & ciclohexane * & \(>\)700 & 6.44 \(\pm\) 0.12 & nd & nd & nd & nd & nd \\
6 & 2-methyl-butanol * & \(>\)700 & 4.01 \(\pm\) 0.31 & nd & nd & nd & nd \\
7 & 3,4-dimethyl-pentanol * & \(>\)700 & 4.31 \(\pm\) 0.35 & nd & nd & nd & nd \\
8 & 1-penten-3-ol * & \(>\)700 & 27.9 \(\pm\) 6.6 & nd & nd & nd & nd \\
9 & 2-penten-1-ol * & 793 & 20.1 \(\pm\) 1.7 & 2.0 \(\pm\) 0.7 & 1.7 \(\pm\) 0.3 & 1.9 \(\pm\) 0.5 & 1.2 \(\pm\) 0.1 & 1.5 \(\pm\) 0.3 \\
10 & 2,3-butanediol * & 794 & 18.2 \(\pm\) 0.5 & 0.9 \(\pm\) 0.3 & 1.0 \(\pm\) 0.3 & 0.7 \(\pm\) 0.1 & 0.6 \(\pm\) 0.0 & 0.7 \(\pm\) 0.1 \\
11 & 5-hexen-2-one * & 795 & 1.6 \(\pm\) 0.1 & 0.9 \(\pm\) 0.2 & 0.7 \(\pm\) 0.0 & 0.9 \(\pm\) 0.4 & 0.8 \(\pm\) 0.1 & 0.7 \(\pm\) 0.2 \\
12 & isopentyl acetate * & 795 & 4.2 \(\pm\) 0.1 & nd & nd & nd & nd & nd \\
13 & 4-pentenal * & 796 & 2.4 \(\pm\) 0.1 & nd & nd & nd & nd \\
14 & butyl ethanoate * & 797 & 1.0 \(\pm\) 0.0 & nd & nd & nd & nd \\
15 & Hexanal * & 801 & 194.2 \(\pm\) 13.6 & 57.9 \(\pm\) 10.3 & 45.4 \(\pm\) 1.7 & 41.6 \(\pm\) 4.9 & 34.1 \(\pm\) 2.3 & 33.7 \(\pm\) 3.5 \\
16 & trans-2-hexenal * & 848 & 4.5 \(\pm\) 0.3 & 2.8 \(\pm\) 0.8 & 3.1 \(\pm\) 1.1 & 1.9 \(\pm\) 0.6 & 1.7 \(\pm\) 0.2 & 1.4 \(\pm\) 0.2 \\
17 & ethyl 2-methylbutanoate * & 852 & 4.7 \(\pm\) 0.5 & 2.7 \(\pm\) 0.5 & 2.0 \(\pm\) 0.0 & 2.1 \(\pm\) 0.8 & 1.8 \(\pm\) 0.1 & 1.8 \(\pm\) 0.1 \\
18 & ethyl 3-methylbutanoate & 857 & nd & 2.2 \(\pm\) 0.7 & 2.3 \(\pm\) 0.7 & 2.3 \(\pm\) 0.4 & 2.2 \(\pm\) 0.2 & 1.3 \(\pm\) 1.0 \\
19 & 3-hexen-1-ol *\({}^{\text{\tiny{a}}\text{\tiny{b}}}\) & 858 & 165.2 \(\pm\) 16.3 & 97.5 \(\pm\) 7.3 & 88.0 \(\pm\) 6.1 & 66.8 \(\pm\) 9.4 & 89.3 \(\pm\) 2.7 & 90.1 \(\pm\) 8.1 \\
20 & NI & 867 & 21.5 \(\pm\) 2.3 & 6.0 \(\pm\) 2.0 & 7.1 \(\pm\) 2.6 & 6.4 \(\pm\) 1.2 & 2.9 \(\pm\) 0.0 & 2.7 \(\pm\) 0.6 \\
21 & 2,6-dimethyl-1-heptene * & 870 & 36.9 \(\pm\) 0.9 & 14.1 \(\pm\) 2.8 & 15.5 \(\pm\) 0.2 & 19.2 \(\pm\) 3.9 & 14.4 \(\pm\) 2.0 & 13.9 \(\pm\) 1.1 \\
22 & 2-hexen-1-ol * & 873 & 114.7 \(\pm\) 10.8 & 66.2 \(\pm\) 3.8 & 75.6 \(\pm\) 7.0 & 66.9 \(\pm\) 6.1 & 71.3 \(\pm\) 5.0 & 72.7 \(\pm\) 4.4 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Volatile compounds of red mombin (_Spondias purpurea_) pulp and powder stored at 0, 60 or 120 days in plastic (PP) or laminated packages (LP). Each value represents the mean \(\pm\) SD (\(\times 10^{6}\) chromatogram units) of three analyses of different pools. Using the same technique, [PERSON] _et al._[15] identified 19 compounds with a carboxen/polydimethylsiloxane (CAR/PDMS) fiber coating (eight esters, seven alcohols, two aldehydes and two ketones).