Comparing Objective Quality Attributes of Grapefruit Imported Into Europe

in HortTechnology
Authors: L.A. Risse1 and A.J. Bongers1
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  • 1 U.S. Department of Agriculture, Agricultural Research Service, European Marketing Research Center, Rotterdam, the Netherlands.

Grapefruit (Citrus paradisi Macf.) were sampled biweekly from importers in Rotterdam, the Netherlands, from Oct. 1992 through Sept. 1993. For each sample, fruit size, weight, peel thickness, internal pulp color, juice weight, total soluble solids (TSS), and total acid (TA) were measured. Three grapefruit cultivars—`Marsh' white, `Ruby Red', and `Star Ruby'—were sampled from 12 countries of origin. Florida fruit weighed more, had the thinnest peel, the most juice, the lowest TA, and the highest TSS/TA ratio for all three cultivars compared to all other origins, except for `Ruby Red' grapefruit from California, which had a lower TA and a higher TSS/TA ratio. Turkish `Ruby Red' and Spanish `Star Ruby' fruit weighed the least and had the least amount of juice compared to fruit from other origins. Turkish fruit had the highest TA and the lowest TSS/TA ratio for all three cultivars from all origins. Israeli `Marsh' white and `Star Ruby' had the highest TSS. Overall, the internal quality characteristics of Florida fruit was high compared to fruit from other origins.

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