Physicochemical Properties and Sensory Evaluation of Citrus Unshiu Produced in Cheju

제주산 온주밀감의 특성과 관능평가

  • Koh, Jeong-Sam (Department of Agricultural Chemistry, Cheju National University) ;
  • Koh, Jeong-Eun (Research Instrument Center, Cheju National University) ;
  • Yang, Sang-Ho (Research Instrument Center, Cheju National University) ;
  • Ahn, Sung-Ung (Department of Agricultural Chemistry, Cheju National University)
  • 고정삼 (제주대학교 농화학과) ;
  • 고정은 (제주대학교 공동실험실습관) ;
  • 양상호 (제주대학교 공동실험실습관) ;
  • 안성웅 (제주대학교 농화학과)
  • Published : 1994.06.30

Abstract

Soluble solids $(^{\circ}Brix)$, acid content and vitamin C content of Citrus miyakawa unshiu and C. okitsu unshiu juice harvested middle of November 1993 in Seuho-Dong and Topyung-Dong, Seogwipo-si, south area of Cheju were $10.7{\sim}11.0$, 1.04% and $41.19{\sim}44.94\;mg/100\;g$ juice, respectively. Carbohydrate was consisted of about 1/2 sucrose, 1/4 glucose, and 1/4 fructose. Fruit weight, peel thickness, soluble solids, pH, acid content and Brix/Acid ratio had a good correlation in linear function with increasing fruit size, respectively. However, hardness and edible part ratio were not showed correlation with increasing fruit size. Middle size of citrus fruit was favorable to panelists, and the citrus peel color of red yellow was more favorable than pale yellow color in sensory evaluation. Sensory evaluation score showed a linear correlation among citrus fruits of C. okitsu unshiu produced in Namwon-ri, Seuho-Dong, Seogwipo-si, south area of Cheju, and that of Chochun-ri, Ara-Dong, Cheju-si, north area of Cheju, and the score was higher according to citrus fruit produced in optimum cultivation area. With increasing Brix/Acid ratio of citrus juice, high sensory evaluation score was gained in panelists. These data obtained are supposed to be applied to the quality evaluation of Citrus unshiu produced in Cheju.

제주지역에서 생산되는 대표적인 품종인 궁천조생과 흥진조생에 대한 품질에 관여하는 물리화학적인 특성을 분석하였고, 과일의 크기, 색깔, 생산지역에 따른 감귤의 맛 등에 대한 관능검사를 실시하였다. 수확적기에 수확한 조생온주의 가용성고형물은 $10.7{\sim}11.0$였으며, 산함량은 1.04%, 비타민 C함량은 $41.19{\sim}44.94\;mg/100\;g$였다. 당은 절반이 자당이었고, 포도당과 과당이 각각 1/4씩 함유하고 있었다. 과일크기에 따라 과중, 껍질두께, 가용성고형물, pH, 산함량, 당산비는 각각 직선적인 상관관계를 가지고 있었으며, 경도와 과육율과는 유의성이 없었다. 관능검사 결과 중간정도 크기의 감귤을 선호하며, 껍질의 색깔은 진한 홍등색일수록 선호하고 있음을 알 수 있었다. 또한, 같은 품종이라고 할지라도 재배적지에서 생산된 감귤일수록 선호도가 높아 직선적인 유의성을 보였으며, 과즙의 경우 당산비가 높을수록 선호하여 고품질 감귤생산을 위한 노력이 필요한 것으로 여겨졌다.

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