| Abstract
| - Release of selected volatile aldehyde compounds from starch-rich matrices was studied by headspaceextraction, using solid-phase microextraction, and gas chromatography. Changes in the rheologicalproperties of the starch-based matrices, due to starch concentration, gelatinization, and interactionswith emulsifiers, were studied by steady shear and dynamic methods. The degree of volatile retentionwas found to depend on the compound properties, starch concentration, native structure of thegranules, and presence of emulsifiers. The nongelatinized starch granules were more effective inlowering the volatile headspace quantities. Loss of the native structural integrity of the granulesdecreases the retention ability. For the nongelatinized starch dispersions, the more hydrophilicemulsifier showed a more pronounced effect on the matrix rheology and also on the aroma retention.A different behavior was observed for the gelatinized systems. Interpretation of the volatile releaseprofiles was made on the basis of the matrix physical properties and interactions among components. Keywords: Starch; gelatinization; aroma release; starch−emulsifier interactions; headspace gaschromatography; SPME extraction; rheology
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