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Impact of the addition of cocoa butter equivalent on the volatile compounds profile of dark chocolate
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Impact of the addition of cocoa butter equivalent on the volatile compounds profile of dark chocolate
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Journal Article
Impact of the addition of cocoa butter equivalent on the volatile compounds profile of dark chocolate
2018
Overview
The effect of the partial replacement of cocoa butter (CB) by cocoa butter equivalent (CBE) in the release of volatile compounds in dark chocolate was studied. The fatty acid profile, triacylglyceride composition, solid fat content (SFC) and melting point were determined in CB and CBE. Chocolate with CB (F1) and with different content of CBE (5 and 10%—F2 and F3, respectively) were prepared. Plastic viscosity and Casson flow limit, particle size distribution and release of volatile compounds using a solid phase microextraction with gas chromatography (SMPE-GC) were determined in the chocolate samples. The melting point was similar for the studied samples but SFC indicated different melting behavior. CBE showed a higher saturated fatty acid content when compared to CB. The samples showed similar SOS triglyceride content (21 and 23.7% for CB and CBE, respectively). Higher levels of POS and lower POP were observed for CB when compared to CBE (44.8 and 19.7 and 19 and 41.1%, respectively). The flow limit and plastic viscosity were similar for the studied chocolates samples, as well as the particle size distribution. Among the 27 volatile compounds identified in the samples studied, 12 were detected in significantly higher concentrations in sample F1 (phenylacetaldehyde, methylpyrazine, 2,6-dimethylpyrazine, 2-ethyl-5-methylpyrazine, 2-ethyl-3,5-dimethylpyrazine, tetramethylpyrazine, trimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, phenethyl alcohol, 2-acetylpyrrole, acetophenone and isovaleric acid). The highest changes were observed in the pyrazines group, which presented a decrease of more than half in the formulations where part of the CB was replaced by the CBE.
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