Study Utilizing a Small Consumer Panel

Ting and McAllister (4) reported on flavor and several other quality factors, including limonin content of 156 Florida-processed canned single-strength grapefruit juice samples obtained from the U.S. retail market. Juices were judged by 12 to 14 consumers (mostly housewives) from the Winter Haven, Florida area. Samples were graded on a nine-point hedonic scale. Limonin content (HPLC) correlated negatively and significantly with flavor (r = — 0.166; P < 0.05). The mean limonin content for all samples was 5.6 jug/mL. Panelist's comments of bitterness were significantly correlated with limonin content (r = 0.233; P

< 0.01) and with flavor (r = -0.434; P < 0.01). The average number of bitterness comments by the panel per sample was 2.19, the largest number for any unfavorable type of comment. Age of the sample from the date of packing also correlated significantly with limonin content (r = -0.233; P< 0.01).

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