Kiwifruit in Syrup: Consumer Acceptance, Purchase Intention and Influence of Processing and Storage Time on Physicochemical and Sensory Characteristics

摘要

Producers of kiwifruit can often be affected by the economic loss generated by culled fruit; thus, the processing of kiwifruit in syrup was proposed as a way to both increase profits and also lower losses for these producers. First, a series of experiments with consumers was successively planned and performed in order to establish the optimal conditions for the final product depending on how the kiwifruit were cut (halves, quarters or slices), the soluble solids concentration (light syrup, syrup, heavy syrup or extra heavy syrup) and the type of sugar (white or brown). Once the processing conditions of the product were selected (sliced kiwi and extra heavy syrup with white sugars), we verified that consumers liked it and that this acceptance was also reflected in their intention to buy the product. Therefore, the process was applied to elaborate both an organic and a conventional version of kiwifruit in syrup. The effect of processing (both organic and conventional) on the physicochemical characteristics of the raw material (both organic and conventional) was studied. All variables, except b*, C*, glucose, fructose and a (w), were significantly modified by processing. Organic kiwifruit has less soluble solids, sugars and total acidity than conventional fruit but a higher pH. These small differences were maintained in the organic kiwifruit in syrup when it was compared to conventional product; however, the difference in the sensory characteristics (as measured by a panel of trained tasters) was not great enough to be detected. Both products were stable over time.