Abstract
Home storage is at the end of the frozen foods distribution chain, and not much is known how it affects frozen vegetables quality. This research presents a computational evaluation of frozen green beans ( Phaseolus vulgaris, L.) quality profile, in terms of ascorbic acid, starch content, chlorophylls a and b, colour (Hunter a and b co-ordinates and total colour difference) and flavour, at storage temperatures of +5, −6, −12 and −18 °C, for respectively, 1, 4, 14, and 60 days. Simulations were set to access the impact of the pre-established after sale dates of the ` star dating' system. Results demonstrate that green beans nutritional and sensory parameters are well retained at the storage temperatures of +5, −6 and −12 °C. At −18 °C, sensory parameters (e.g. colour and flavour) are well retained, but nutritional parameters, such as ascorbic acid and starch, degraded. The study concluded that the `star dating' system is a good after sale dating system for frozen green beans for the storage temperatures of +5, −6 and −12 °C. The system fails to maintain a good balance between sensory and nutritional parameters at low storage temperatures (e.g. <−18 °C).
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